1) How do metal atoms form ions? a) They lose electrons to form negative ions b) They gain electrons to form positive ions c) They lose electrons to form positive ions 2) What happens when sodium and chlorine atoms form sodium chloride? a) An electron transfers from each sodium atom to each chlorine atom b) An electron transfers from each chlorine atom to each sodium atom c) Sodium and chlorine atoms share electrons 3) What is a covalent bond? a) A bond formed between oppositely charged ions b) A bond formed when two atoms share a pair of electrons c) A bond formed by delocalised electrons 4) In a dot and cross diagram, what does each dot and cross represent? a) a proton b) a neutron c) an electron 5) What is the greatest number of covalent bonds that one carbon atom can form? a) 2 b) 3 c) 4 6) What combination of elements will form covalent bonds? a) Metal atom and another metal atom b) Metal atom and non-metal atom c) Non-metal atom and another non-metal atom 7) What force is overcome when covalent molecular substances melt or boil? a) Intermolecular forces b) Covalent bonds in molecules c) Electrostatic forces between ions 8) Which of the following pairs of elements would join together with ionic bonding a) hydrogen and water b) sodium and chlorine c) nitrogen and hydrogen  9) what ions are made when potassium (K) donates 1 electron a) K ion b) K+ Ion c) K- Ion 10) When sulphur accepts 2 electrons during ionic bonding what ion is formed? a) S2- ion b) S- ion c) S2+ ion

Bonding revision

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