structure and bonding 2.0 / 5 based on 1 rating ? ChemistryStructure and bondingGCSEAQA Created by: bxthanyCreated on: 26-04-14 15:49 what is a compound and how are they made? when two or more elements react. The atoms of elements join together by sharing/transferring electrons to achieve stable electronic structures 1 of 18 what is covalent bonding? when atoms of non-metallic elements join together 2 of 18 what is ionic bonding? when metallic and non-metallic elements react 3 of 18 how many electrons are in the outer shell of atoms of elements in group 1? 1 4 of 18 why is the compound sodium chloride written as NaCl? as it has equal sodium ions to chloride ions 5 of 18 what does the ratio of ions in an ionic compound depends on? the charges of the ions 6 of 18 Ionic bonds hold oppositely charged ions together in what? giant structures (lattices) 7 of 18 Each ion in a lattic is surrounded by ions of what charge and why? ions of the opposite charge to hold it firm in place 8 of 18 why are ionic compounds neutral? the charges on the ions always cancel each other out 9 of 18 what does the formula of an ionic compound show? the ratio of ions present in the compound 10 of 18 Do atoms of non-metals gain or lose electrons? gain 11 of 18 what is a molecule? a substance with atoms held together by a covalent bond 12 of 18 when is a covalent bond formed? when two atoms share a pair of electrons 13 of 18 what are giant covalent structures (macromolecules)? atoms that can form several bonds like carbon and join together 14 of 18 atoms in a metallic element are the same size or difference sizes? same size 15 of 18 what happens to electrons in the highest level? they are delocalised which strongly attracts positive ions and gold the giant structure together 16 of 18 what holds atoms in metals together? electrostatic forces 17 of 18 what do atoms in metal form? giant structures which layers of atoms are arranged in regular patterns 18 of 18
Comments
No comments have yet been made