Hydrogen s and p block elements Keyword cards 3.0 / 5 based on 2 ratings ? ChemistryUniversityNone Created by: AnthonyCreated on: 24-01-13 13:25 Coordination Number Number of nearest neighbours to an atom or ion in a crystal lattice. 1 of 10 Unit Cell The smallest repeating unit in a crystal structure. 2 of 10 Lattice Enthalpy The enthalpy change when one mole of a solid ionic lattice is formed into it usual lattice structure from its consituent gaseous phase. 3 of 10 Hydration Enthalpy The enthalpy change when a gas phase ion is solvated in aqueous solution. 4 of 10 Allotropy Elements exist in different structural forms. The chemical bonding is different in between the atoms 5 of 10 Polymorphism Elements or compounds that exist in different crystal forms which contain identical repeating units. 6 of 10 Catenation Elements which form structures containing sequences of elements. 7 of 10 Ionisation Energy The energy required to remove an electron from an atom in the gaseous phase. 8 of 10 Electron Affinity The energy given out when an electron is added to an atom in the gas phase 9 of 10 Electronegativity The power of an atom to attract electrons to itself in a molecule. 10 of 10
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