Metals reside on the left side of the table, while non-metals reside on the right. H or p) and the product nuclei as a rare oxygen isotope. One mole of a substance has the same mass in grams that one atom or molecule has in atomic mass units. The periodic table (also known as the periodic table of elements) is organized so scientists can quickly discern the properties of individual elements such as their mass, electron number, electron configuration and their unique chemical properties. Since 1961 the standard unit of atomic mass has been one-twelfth the mass of. The numbers in the periodic table that we identified as the atomic masses of the atoms not only tell us the mass of one atom in u but also tell us the mass of 1 mol of atoms in grams. One mole of a substance has the same mass in grams that one atom or molecule has in atomic mass units. And whereas one sodium atom has an approximate mass of 23 u, 1 mol of Na atoms has an approximate mass of 23 grams. Hydrogen (H)- Atomic number: 1- Atomic mass: 1.008- Classification: Nonmetal- Symbol: H. Whereas one hydrogen atom has a mass of approximately 1 u, 1 mol of H atoms has a mass of approximately 1 gram. First 20 Elements of the Periodic Table with Information1. The number in a mole, Avogadro’s number, is related to the relative sizes of the atomic mass unit and gram mass units. Periodic Table of Elements 1 H Hydrogen 1.008 2 He Helium 4.0026 3 Li Lithium 6.94 4 Be Beryllium 9.0122 5 B Boron 10.81 6 C Carbon 12.011 7 N Nitrogen.
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