General Chemistry Terms 0.0 / 5 ? ChemistryAcids, bases and saltsBonding & shapesRedoxASOCR Created by: Zachary LanghorneCreated on: 08-12-13 12:29 Isotopes Isotopes are atoms of the same element with different numbers of nuetr 1 of 14 Atomic (proton) number Atomic number if the number of protons in the nucleus of an atom. 2 of 14 Mass (nucleon) number Mass number is the number of particles in the nucleus of an atom (Neutrons + Protons). 3 of 14 Ion An ion is a positively or negatively charged atom or covalently bonded group of atoms. 4 of 14 Relative isotopic mass Relative atomic mass is the mass of an atom of an isotope compared with one-twelth of the mass of one atom of Carbon-12 5 of 14 Relative atomic mass Relative atomic mass is the mass of an atom of an atom compared with one-twelfth of the mass of one atom of Carbon-12 6 of 14 Relative molecular mass Relative molecular mass is the weighted mean mass of a molecule compared with one-twelfth of the mass of an atom of Carbon-12 7 of 14 Relative formula mass Relative formula mass is the weighted mean mass of a formula unit compared with one-twelfth of the mass of an atom carbon-12 8 of 14 Amount of substance Amount of substance is the quantity whose unit is the mole. Chemists use 'amount of substance' as a means of counting atoms. 9 of 14 Avogadro Constant The avogadro constant is the number of atoms per mole of carbon-12 isotope (6.02x10^23 mol^-1). 10 of 14 Mole A mole is the amount of any substance containing as many particles as there are carbon atoms in exactly 12g of the carbon 12 isotope. 11 of 14 Molar mass Molar mass is the mass per mole a substance. The units of molar mass are g/mol^-1 12 of 14 Empirical Formula The empirical formula is the simplest whole-number ratio of atoms of each element present in a compound. 13 of 14 Molecule A molecule is a small group of atoms held together by covalent bonds. 14 of 14
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