1 day ago · In the typical periodic table each element is listed by its element symbol and atomic number Atoms compounds and ions Chemistry Science Khan April 19th, 2019 - Chemistry is the study of matter and all matter is made up of atoms We will learn about elements atomic number and mass isotopes moles chemistry moles not the animal and …This table lists the mass and percent natural abundance for the stable nuclides. The mass of the longest lived isotope is given for elements without a stable nuclide. Nuclides marked with an asterisk (*) in the abundance column indicate that it is not present in nature or that a meaningful natural abundance cannot be given. The isotopic mass renaissance men Feb 4, 2023 · Interactive periodic table with up-to-date element property data collected from authoritative sources. Look up chemical element names, symbols, atomic masses and …The periodic table (see figure below) displays all of the known elements and is arranged in order of increasing atomic number. In this table, an element's atomic number is indicated above the elemental symbol. Hydrogen, at the upper left of the table, has an atomic number of 1. Every hydrogen atom has one proton in its nucleus.Jan 8, 2021 · Be Na Mg The Periodic Table of Elements pa Fm Md NoThe atomic size increases from top to bottom within a group and decreases as it goes down 2. Describe similar trends for mass in your new table. Explain your placement of any elements that does not fit the trend. It is organized from the lowest to highest atomic mass 3. Predict the placement of a newly found element, Ph, which is a deep pink gas. weather road conditions i 80 nebraska Atomic number, Z. Element Symbol. Name. Atomic Mass, u ... METALLOID. NOBLE GAS. LANTHANIDE. ACTINIDE. Periodic. THE of Elements.. Table.Jun 8, 2016 · The Periodic Table of Elements C 6 CARBON 12 Atomic Number Chemical Symbol Atomic Weight Chemical Name = Number of Protons Number of Electrons= = Number of Protons Number of Neutrons+ * = Solid at room temperature = Liquid at room temperature = Gas at room temperature = Radioactive = Artificially Made KEY METALS NON-METALS apartments for rent joliet il The mass of an element in terms of AMU can also be defined as the total number of both neutrons and protons present in that element. For example - the atomic mass of the element sodium Na - 23 is equals to 22.989769 u or 23 (Approx.), The element has a total of 11 protons and 12 neutrons present in its nucleus, hence giving the total of 23 ...Mar 1, 2023 · Web july 23, 2022 by tamble. Following is the table of atomic mass and symbols of first 30 elements of the periodic table: 118 Elements List Pdf Download For Free Using The Direct Download Link Given At The Bottom Of This Article. In this table, an element's atomic. Web common unit of mass and w eight 1 pound = 453.59 grams 1 …The atomic mass (A) of an atom is the sum of the numbers of protons and neutrons in the nucleus (Fig. 2.6). Given the atomic mass for a nucleus (and knowing the atomic number, Z , of that particular atom), you can determine the number of neutrons by subtracting the atomic number from the atomic mass. PDF. Here you will know about the atomic mass of every element in the table, we all know that there are 118 elements in the table and it is one of the important topics of chemistry … saws at lowepercent27sATOMIC MASSES OF THE ELEMENTS. Symbol Element Atomic Number Atomic Mass Symbol Element Atomic Number Atomic Mass Ac Actinium 89 227.03* Hg Mercury 80 200.59 Al Aluminum 13 26.981539 Mo Molybdenum 42 95.94 Am Americium 95 241.06* Nd Neodymium 60 144.24 Sb Antimony 51 121.757 Ne Neon 10 20.1797Supplementary answer sheets will be provided on request. Tie them loosely but securely with a string INSIDE this Question-Answer Book HKDSE-CHEM B (F5) A Periodic Table is printed on the back of this Question-Answer Book. Atomic numbers and relative atomic masses of elements can be obtained from the Periodic Table. Class Number Question No. hyolc In this video you will learn trick to learn the atomic mass of first 30 elements of the periodic table. In this video you can easily learn the atomic number ...Mass of Atom (u) % Abundance 1 Hydrogen 1H 1.007825 99.9885 Deuterium 2H 2.014102 0.0115 Tritium 3H 3.016049 * 2 Helium 3He 3.016029 0.000137 4He 4.002603 99.999863 3 Lithium 6Li 6.015122 7.59 7Li 7.016004 92.41 4 Beryllium 9Be 9.012182 100 5 Boron 10 B 10.012937 19.9 11 B 11.009305 80.1 6 Carbon 12 C 12.000000 98.93The atomic mass of each element is found under the element symbol in the periodic table. Examples are shown below. The atomic mass of tin (Sn) is 118.71 u while the atomic mass of carbon (C) is 12.011 u. On the other hand, the atomic number (Z) of each element is found above the atomic symbol. Atomic mass indicated on entries of the Periodic Table.Mar 1, 2016 · Table 3: Conventional atomic weights. For users needing an atomic-weight value for an unspecified sample with disregard to the uncertainty, such as for trade and commerce, the following conventional values are provided. Atomic weights are scaled to Ar(12C) = 12, where 12C is a neutral atom in its nuclear and electronic ground state. - …This table lists the mass and percent natural abundance for the stable nuclides. The mass of the longest lived isotope is given for elements without a stable nuclide. Nuclides marked with an asterisk (*) in the abundance column indicate that it is not present in nature or that a meaningful natural abundance cannot be given. The isotopic mass Apr 6, 2021 · The short of each element is clickable. When you click it, it will show you the detail information about the element. Alternately, you can also use the printable one. It is also available in high resolution pdf. If you like the design or display of this periodic table rather than that of the others, you can print it.The latest release of the Periodic Table (dated 4 May 2022) includes the most recent abridged standard atomic weight values released by the IUPAC Commission on Isotopic Abundances and Atomic Weights (), compiled as part of the 2021 Table of Standard Atomic Weights 2021.For elements that lack isotopes with a characteristic isotopic abundance in natural terrestrial samples, the mass number of ... princess diana View Periodic Table of Elements Research Project P.2.pdf from CHE INORGANIC at Miami Carol City Senior High. Periodic Table of Elements Reasearch Project The Element Helium First off, the elementDOI: 10.1016/1044-0305(91)80065-F Corpus ID: 5540669; Isotope dilution gas chromatography/mass spectrometry for platinum determination in urine @article{Aggarwal1991IsotopeDG, title={Isotope dilution gas chromatography/mass spectrometry for platinum determination in urine}, author={Suresh K. Aggarwal and Michael T. Kinter and David A. Herold}, journal={Journal of the American Society for Mass ... keihin ecu pinout Nihonium (symbol Nh), for element 113. Moscovium (symbol Mc), for element 115. Tennessine (symbol Ts), for element 117. Oganesson (symbol Og), for element 118. This followed a 5-month period of public review after which the names earlier proposed by the discoverers were approved by IUPAC. You can buy this periodic table poster and more …18 lug 2022 ... High Def Printable Periodic Table of Elements This black and white ... symbols, atomic numbers, atomic weights, element groups, and periods. craigslist estate sales today The atomic mass (A) of an atom is the sum of the numbers of protons and neutrons in the nucleus (Fig. 2.6). Given the atomic mass for a nucleus (and knowing the atomic number, Z , of that particular atom), you can determine the number of neutrons by subtracting the atomic number from the atomic mass.May 4, 2022 · PDF | Following the reviews of atomic-weight determinations and other cognate data in 2015, 2017, 2019 and 2021, the IUPAC (International Union of Pure... | …All atoms of the same element have the same number of protons in the nucleus and consequently have the same atomic number. All atoms of the same neutral element have the same number of electrons as well.Mar 1, 2016 · The standard atomic weights of four elements have been revised based on recent determinations of isotopic abundances in natural terrestrial materials: cadmium to 112.414 (4) from 112.411 (8), molybdenum to 95.95 (1) from 95.96 (2), selenium to 78.971 (8) from 78.96 (3), and thorium to 232.0377 (4) from 232.038 06 (2). The Commission on Isotopic… plump anal sex Oct 5, 2001 · Three such elements (Th, Pa, and U), however, do have a characteristic terrestrial isotopic composition, and an atomic mass is given for them. An uncertainty in the last digit in the Atomic Mass column is shown by the number in parentheses; e.g., 1.00794(7) indicates ±0.00007. †Element 112 named shortly before the release of this text.Be Na Mg The Periodic Table of Elements pa Fm Md No18 lug 2022 ... High Def Printable Periodic Table of Elements This black and white ... symbols, atomic numbers, atomic weights, element groups, and periods. capias vs warrant Dec 2, 2021 · 118 Elements List And Their Symbols And Atomic Numbers PDF Free Download . The modern periodic table, today, consists of 118 elements in total. Since …Atomic Symbol Name Weight 1 1 H Hydrogen 1.008 2 He Helium 4.0026 2 3 Li Lithium 6.94 4 Be Beryllium 9.0122 5 B Boron 10.81 6 C Carbon 12.011 7 N Nitrogen 14.007 8 O Oxygen 15.999 9 F Fluorine 18.998 10 Ne Neon 20.180 3 11 Na Sodium 22.990 12 Mg Magnesium 24.305 13 Al Aluminium 26.982 14 Si Silicon 28.085 15 P Phosphorus 30.974 16 S Sulfur 32.06 Atomic Symbol Name Weight 1 1 H Hydrogen 1.008 2 He Helium 4.0026 2 3 Li Lithium 6.94 4 Be Beryllium 9.0122 5 B Boron 10.81 6 C Carbon 12.011 7 N Nitrogen 14.007 8 O Oxygen 15.999 9 F Fluorine 18.998 10 Ne Neon 20.180 3 11 Na Sodium 22.990 12 Mg Magnesium 24.305 13 Al Aluminium 26.982 14 Si Silicon 28.085 15 P Phosphorus 30.974 16 S Sulfur 32.06 dnd accessories Atomic number, Z. Element Symbol. Name. Atomic Mass, u ... METALLOID. NOBLE GAS. LANTHANIDE. ACTINIDE. Periodic. THE of Elements.. Table.9 lug 2022 ... Atomic mass of all elements (along with the rounded off values) is mentioned in the chart below. Atomic Number, Element, Atomic Mass (u), Atomic ... route michelin Oct 12, 2022 · Periodic Table of Elements. Properties Electrons Isotopes Compounds Wide Don't like ads? No ... Atomic Symbol Name Weight. 1. 1 H Hydrogen 1.008; 2 He Helium …31 gen 2022 ... Dmitri Mendeleev, a Russian chemist has given the first periodic table. He arranged all the chemical elements in order of their atomic mass ... mcdonaldpercent27s near me number Here you will know about the atomic mass of every element in the table, we all know that there are 118 elements in the table and it is one of the important topics of chemistry and there are many students who have to perform practical and in order to perform the practical's one must be knowing the atomic number so that their experiment doesn't …Jan 1, 2018 · Summary. The atomic number designates the number of protons in an element’s nucleus and because that determines its electronic structure, its chemical behavior. The mass number of a nuclide is equal to the number of protons and neutrons in the nucleus; variation in the number of the latter produces results in different isotopes of …Jun 9, 2019 · An atomic mass unit is defined as a mass equal to one twelfth of an atom of carbon-12. The mass of any isotope of any element is expressed in relation to the carbon-12 standard. For example, one atom of helium-4 has a mass of 4.0026 amu. An atom of sulfur-32 has a mass of 31.972 amu. cross stitch hoop frame Woods Hole Oceanographic InstitutionThese values correspond to current best knowledge of the elements in natural terrestrial sources. For elements that have no stable or long-lived nuclides, the mass number of the nuclide with the longest confirmed half-life is listed between square brackets. - Elements with atomic numbers 112 and above have been reported but not fully authenticated. The lightest chemical element is Hydrogen and the heaviest is Hassium. The unity for atomic mass is gram per mol. Please note that the elements do not show their natural relation towards each other as in the Periodic system. There you can find the metals, semi-conductor (s), non-metal (s), inert noble gas (ses), Halogens, Lanthanoides ...You can download and print the pdf file of the printable periodic table of the elements. This periodic table gives the electronegativity value for each of the elements. Valence Periodic Table Printable Periodic Tables This color printable periodic table indicates each element's symbol, atomic number, name and maximum valence. Todd Helmenstine ponytail hairstyles for black hair with weave Periodic Table - PtableOct 15, 2019 · These values correspond to current best knowledge of the elements in natural terrestrial sources. For elements that have no stable or long-lived nuclides, the … what stores make car keys glow worm ultracom 2 cxi no hot water Aug 31, 2021 · Mendeleev's periodic table is an arrangement of the elements that group similar elements together. He left blank spaces for the undiscovered elements (atomic masses, element: 44, scandium; 68, gallium; 72, germanium; & 100, technetium) so that certain elements can be grouped together. The elements of the periodic table sorted by atomic mass. click on any element's name for further information on chemical properties, environmental data or ...Ionic compounds are usually formed when a metal reacts with a non-metal. Ionic compounds are held together by ionic bonds. NaCl is an example of an ionic compound. Explanation: → Element 'A' belong to group 1, period 3 indicates. 'A' is an alkali metal. It belongs to group 3 i.e. it must be Na. An element belonging to group 1 is having valency 1.Nov 12, 2013 · Table of Isotopic Masses and Natural Abundances This table lists the mass and percent natural abundance for the stable nuclides. The mass of the longest lived … menu of applebee Aug 5, 2021 · 118 Elements List PDF. 118 Elements List PDF Download for free using the direct download link given at the bottom of this article. The periodic table of elements is …THE PERIODIC TABLE OF THE ELEMENTS. 1. 1.008. H. Hydrogen. 3. 6.939. Li. Lithium. 11. 22.990 ... Atomic weight. Element name. Element symbol. Atomic number.The atomic mass (A) of an atom is the sum of the numbers of protons and neutrons in the nucleus (Fig. 2.6). Given the atomic mass for a nucleus (and knowing the atomic number, Z , of that particular atom), you can determine the number of neutrons by subtracting the atomic number from the atomic mass. chufa The Periodic Table of the Elements 1 H Hydrogen 1.00794 2 He Helium 4.003 3 Li Lithium 6.941 4 Be Beryllium 9.012182 5 B Boron 10.811 6 C Carbon 12.0107 7 N Nitrogen 14.00674 8 O Oxygen 15.9994 9 F Fluorine 18.9984032 10 Ne Neon 20.1797 11 Na Sodium 22.989770 12 Mg Magnesium 24.3050 13 Al Aluminum 26.981538 14 Si Silicon 28.0855 15 P Phosphorus ...Atoms of the same element with. • same number of protons (same atomic number). • different numbers of neutrons. (different mass number). harbor freight tool boxes on sale All atoms of the same element have the same number of protons in the nucleus and consequently have the same atomic number. All atoms of the same neutral element have the same number of electrons as well.It has each element’s number, symbol, name, and atomic mass. The colors identify element groups and are intentionally pale so you can read the numbers after printing. This is the periodic table we recommend you use for calculations and homework. Download Links: Image | PDF | Google Apps. list of stalker games Periodic Table of the Elements. Atomic number. 14. Symbol. Si. Atomic mass. 28.086. Silicon. Name. 18. VIIIA. 1. 2. 1. H. He. 2. 13. 14. 15. 16. 17. 1.008.AVERAGE ATOMIC MASS (= Atomic Weight) the weighted average of the masses of the atoms (isotopes) in a naturally occurring sample of an element masses are based off of the atomic mass unit (amu) defined as one twelfth the mass of a carbon-12 atom these values can be fractions Interactive periodic table with up-to-date element property data collected from authoritative sources. Look up chemical element names, symbols, atomic masses and other properties, visualize trends, or even test your elements knowledge by playing a periodic table game! rdeosNov 5, 2019 · This printable periodic table contains the atomic number, element symbol, element name, atomic weights and most common valence charges. Todd Helmenstine This table also contains the element number, element symbol, element name, and atomic weights of each element. This periodic table in PDF format can be downloaded for printing. 02 of 04 Mar 1, 2023 · Web july 23, 2022 by tamble. Following is the table of atomic mass and symbols of first 30 elements of the periodic table: 118 Elements List Pdf Download For Free Using The Direct Download Link Given At The Bottom Of This Article. In this table, an element's atomic. Web common unit of mass and w eight 1 pound = 453.59 grams 1 …Download the Periodic Table of the Elements with names, atomic mass and number in printable .pdf and image format. Use the periodic table chart by element ... karl 14 hours ago · what is the approximate area of the circle shown below apex SOLVED: "What is the approximate area of a circle …. Okay, so the area of a circle is pi r squared pi r squared. So pi is going to be equal to 3.14. And our radius here is what is it 17? dsw dr schollpercent27s Nihonium (symbol Nh), for element 113. Moscovium (symbol Mc), for element 115. Tennessine (symbol Ts), for element 117. Oganesson (symbol Og), for element 118. This followed a 5-month period of public review after which the names earlier proposed by the discoverers were approved by IUPAC. You can buy this periodic table poster and more …Be Na Mg The Periodic Table of Elements pa Fm Md No Using the Periodic Table of Elements flashcard maker you can customize a set of flashcards with only the elements and facts that you need. Each card can contain any combination of atomic number, element symbol, atomic mass, element name, and state at standard temperature and pressure.Jun 8, 2016 · The Periodic Table of Elements C 6 CARBON 12 Atomic Number Chemical Symbol Atomic Weight ... METALS NON-METALS * The atomic weights listed on this … edible picture printer Relative Atomic Mass (A) Atomic Number (Z) Element Symbol Element Name 1 IA Group CAS Group IUPAC 1 2 ... Periodic Table of the Elements Lu LUTETIUM 71 174.97 Lr The lightest chemical element is Hydrogen and the heaviest is Hassium. The unity for atomic mass is gram per mol. Please note that the elements do not show their natural …atomic mass from left to right across each row. When he placed eight elements in each row and then started again in the next row, each column of the table ...Periodic Table With Atomic Mass Alkali Metal Alkaline Earth Transition Metal Basic Metal Metalloid Nonmetal Halogen Noble Gas Lanthanide H Hydrogen 1.008 ... most dangerous city in arkansas 2022 The mass of an element shown in a periodic table or listed in a table of atomic masses is a weighted, average mass of all the isotopes present in a naturally occurring sample of that element. This is equal to the sum of each individual isotope’s mass multiplied by its fractional abundance. Mar 1, 2016 · Table 3: Conventional atomic weights. For users needing an atomic-weight value for an unspecified sample with disregard to the uncertainty, such as for trade and commerce, the following conventional values are provided. Atomic weights are scaled to Ar(12C) = 12, where 12C is a neutral atom in its nuclear and electronic ground state. - …Jan 20, 2023 · ATOMIC MASSES OF THE ELEMENTS. Symbol Element Atomic Number Atomic Mass Symbol Element Atomic Number Atomic Mass Ac Actinium 89 227.03* Hg Mercury 80 200.59 Al Aluminum 13 26.981539 Mo Molybdenum 42 95.94 Am Americium 95 241.06* Nd Neodymium 60 144.24 Sb Antimony 51 121.757 Ne Neon 10 20.1797 Ar … mta train cleaner jobs 1 day ago · Module 2: Atomic Structure and History of Atomic Theory Mixture of Isotopes and Atomic Mass Investigation Report Introduction: Atoms of an element come in varieties called isotopes. Isotopes are atoms of the same element which have different masses. The naturally occurring isotopes of an element each have a natural abundance, which is the …Periodic Table With Atomic Mass Alkali Metal Alkaline Earth Transition Metal Basic Metal Metalloid Nonmetal Halogen Noble Gas Lanthanide H Hydrogen 1.008 ... lowepercent27s fans indoor Periodic Table of the Elements. American Spellings hydrogen ... 9.012182. Element Name. Atomic #. Atomic Symbol. Atomic Mass.May 4, 2022 · 8 Jan 2016 [ pdf file – 109 KB] including Uut, Uup, Uus, and Uuo and following the announcement on 30 Dec 2015 of the discoveries of four new chemical elements. This table includes the recently added elements 113, 115, 117, and 118 with their temporary names and symbols ( see related News , released 30 Dec 2015), the standard atomic weights ... Get essential facts about the first 20 elements , all in one convenient place, including the name, atomic number, atomic mass, element symbol, group, and electron configuration. The entries on this table include each cover's subjects and their artists (photographer or illustrator). Asked for: complete electron configuration.Printing out the Periodic Table as a Poster ( 9 x A4 pages ). 1. Open this file in a PDF Reader – e.g. Adobe Acrobat Reader ... funky kong plush toy This table lists the mass and percent natural abundance for the stable nuclides. The mass of the longest lived isotope is given for elements without a stable nuclide. Nuclides marked with an asterisk (*) in the abundance column indicate that it is not present in nature or that a meaningful natural abundance cannot be given. The isotopic mass Periodic Table Of Elements Rounded Atomic Mass. Atomic size From the Regular Dinner table, there are actually facts about atomic size, the amount of protons and neutrons in an atom, and also the element'sname and symbol, and atomic quantity. dallas cowboys cheerleaders making the team Periodic Table of the Elements. 6. Cr. Chromium. 51.996. 74. W. Tungsten. 183.85. 106. Tc. Molibdenum Technetium. 95.94. 98.907. Seaborgium. [266].Mar 1, 2016 · Table 3: Conventional atomic weights. For users needing an atomic-weight value for an unspecified sample with disregard to the uncertainty, such as for trade and commerce, the following conventional values are provided. Atomic weights are scaled to Ar(12C) = 12, where 12C is a neutral atom in its nuclear and electronic ground state. - …Get essential facts about the first 20 elements , all in one convenient place, including the name, atomic number, atomic mass, element symbol, group, and electron configuration. The entries on this table include each cover's subjects and their artists (photographer or illustrator). Asked for: complete electron configuration. llefv Be Na Mg The Periodic Table of Elements pa Fm Md NoOct 12, 2022 · Periodic Table of Elements. Properties Electrons Isotopes Compounds Wide Don't like ads? No ... Atomic Symbol Name Weight. 1. 1 H Hydrogen 1.008; 2 He Helium …Oct 12, 2022 · Periodic Table of Elements. Properties Electrons Isotopes Compounds Wide Don't like ads? No ... Atomic Symbol Name Weight. 1. 1 H Hydrogen 1.008; 2 He Helium …What is my atomic mass? 1pt c. What is my atomic number? 1pt d. How many protons, electrons and neutrons do I have? 3pts e. Draw me in a neutral state: 2pts f. How many valence electrons do I have? 1pt g. Am I reactive or nonreactive? 1 pt h. How many electrons would I have if I became a -2 ion? 1pt 1. Find an element in the second family and ... virtual desktop oculus Nov 5, 2019 · This periodic table contains the atomic masses of the elements as accepted by the IUPAC (09-2013). Todd Helmenstine. This black and white periodic table contains …Jun 8, 2016 · * The atomic weights listed on this Table of Elements have been rounded to the nearest whole number. As a result, this chart actually displays the mass number of a specific isotope for each element. An element's complete, unrounded atomic Printing out the Periodic Table as a Poster ( 9 x A4 pages ). 1. Open this file in a PDF Reader – e.g. Adobe Acrobat Reader ...1 H Hydrogen 1.008 2 He Helium 4.003 3 Li Lithium 6.941 4 Be Berylium 9.012 5 B Boron 10.81 6 C Carbon 12.01 7 N Nitrogen 14.01 8 O Oxygen 16.00 9 F Fluorine 19.00 10 Ne Neon 20.18 11 Na Sodium 22.99 12 Mg Magnesium 24.31 13 Al Aluminum 26.98 14 Si Silicon 28.09 15 P Phosphorus 30.97 16 S Sulfur 32.07 17 Cl Chlorine 35.45 18 Ar Argon 39.95 19 K p ebt illinois 2022 2023 These values correspond to current best knowledge of the elements in natural terrestrial sources. For elements that have no stable or long-lived nuclides, the mass number of the nuclide with the longest confirmed half-life is listed between square brackets. - Elements with atomic numbers 112 and above have been reported but not fully authenticated. 8 giu 2016 ... The atomic weights listed on this Table of Elements have been rounded ... displays the mass number of a specific isotope for each element. magic voxel Jun 6, 2022 - Structure of the Atom Class 9 Notes For Science Chapter 4. NCERT CBSE Notes For Class 1 to 12 All Subjects Chapter Wise Free Pdf Download.Atomic Symbol Name Weight 1 1 H Hydrogen 1.008 2 He Helium 4.0026 2 3 Li Lithium 6.94 4 Be Beryllium 9.0122 5 B Boron 10.81 6 C Carbon 12.011 7 N Nitrogen 14.007 8 O Oxygen 15.999 9 F Fluorine 18.998 10 Ne Neon 20.180 3 11 Na Sodium 22.990 12 Mg Magnesium 24.305 13 Al Aluminium 26.982 14 Si Silicon 28.085 15 P Phosphorus 30.974 16 S Sulfur 32.06 rottweiler breeders in michigan 18 lug 2022 ... High Def Printable Periodic Table of Elements This black and white ... symbols, atomic numbers, atomic weights, element groups, and periods.The atomic number is tied to the position of the element in the Periodic Table and therefore the number of protons defines what sort of element you are talking about. So, if an atom has 8 protons (atomic number = 8) , it must be oxygen .General properties, states, energies, appearance and characteristics. Neodymium is a soft silvery metal that tarnishes in air. Discoverer: Scientists at Dubna, Russia (1964)/AlberThese values correspond to current best knowledge of the elements in natural terrestrial sources. For elements that have no stable or long-lived nuclides, the mass number of the nuclide with the longest confirmed half-life is listed between square brackets. - Elements with atomic numbers 112 and above have been reported but not fully authenticated. keihin ecu pinout