1 Type of bonds ___________ formed by sharing of electrons between atoms of non-metals ___________ electrostatic attraction between positive ions and negative ions. Formed by the transfer of electrons from atoms of metals to atoms of non- metals _________ electrostatic attraction between the positively charged metal ions and the negatively charged electrons present in all metals/alloys Revision - Structure & Bonding

2 Identify each of the following structure. Give an example of each

3 Properties of ionic compounds Properties of simple covalent substances have ________ melting and boiling points. Conducts electricity in _______ and ______ states due to the presence of _____ _____. Soluble in water but not soluble in organic solvents have ________ melting and boiling points. Do not conducts electricity in any states except _____________ ___________________ insoluble in water but soluble in organic solvents

4 Draw dot-and-cross diagrams for each of the following. Show only the outer shell. a) H 2 Ob) Aluminium oxide c) NH 3 d) N 2 e) Magnesium chloridef) N 2 H 4

5 CuCuOgraphitediamondCl 2 O a)Which of the substance(s) above has a giant molecular structure? ___________ b)Which of the substance(s) above conducts electricity by means of mobile ions? _______ c)Which of the substance(s) above conducts electricity by mobile electrons? ________ d)Which of the following substance(s) is used as a lubricant? ______________ e)Which of the following has a simple molecular structure? ______________