Chemistry Unit 1 0.0 / 5 ? ChemistryAll of Unit 1ASAQA Created by: Jasmine KhatriCreated on: 14-01-15 12:38 Atomic number Number of protons 1 of 12 Mass number number of protons + number of neutrons 2 of 12 Isotope Same number or protons but different number of neutrons. 3 of 12 Relative atomic mass The average mass of an atom of an element over 1/12 the mass of a carbon atom 4 of 12 Relative molecular mass The average mass of a molecule over 1/12 the mass of a carbon atom 5 of 12 Ionisation energies The energy required to remove one electron from the outer shell. 6 of 12 Ionic Bond Electrons transferred from metals to non-metals 7 of 12 Covalent bonding Electrons shared between atoms 8 of 12 Metallic bonding Electrons are spread between metal ions to form a lattice of positive ions held together by a sea of delocalised electrons 9 of 12 Electronegativity The ablity of an atom to pull electrons towards itself in a covalent bond 10 of 12 Empirical formula The simplest ratio of atoms of each element present in a compound 11 of 12 Molecular Formula The actual number of atoms of each element in a compound 12 of 12
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