Chemistry- definitions: atomic structure 0.0 / 5 ? ChemistryAtomic StructureASAQA Created by: jasmin.portiaCreated on: 14-11-17 20:34 mass number total number of protons and neutrons in the nucleus of an atom of an element 1 of 11 atomic number the number of protons in the nucleus of an atom 2 of 11 first ionisation energy the enthalpy change for the removal the removal of one mole of electrons from one mole of atoms in the gas phase 3 of 11 empirical formula the simplest whole number ratio of atoms of each element present in a molecule 4 of 11 relative atomic mass average mass of one atom of an element divided by one twelfth of a carbon12 atom 5 of 11 relative molecular mass average mass of one molecule divided by one twelfth of a carbon12 atom 6 of 11 structural isomers compounds with the same molecular formula but different structures 7 of 11 displayed formula an arrangement which shows all bonds present in a molecule 8 of 11 functional group an atom or group of atoms that when present in different molecules, causes them to have similar chemical properties 9 of 11 isotopes atoms of the same element with the same atomic number but different mass numbers 10 of 11 electronegativity the power of an atom to attract the shared pair of electrons in a covalent bond 11 of 11
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