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Question

(a) The table below compares some properties of metals and non-metals. Write down the missing statements (i) to (iv):
MetalsNonmetals(i) Poor conductors of heat(ii) Malleable(iii) Form positive ions(iv) Form acidic oxides

(b) How many valence electrons are present in:
1. Metals
2. Non - metals [5 MARKS]

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Solution

a) 4 Marks
b) 1 Mark

(a) (i) Goods conductors of heat.
(ii) Brittle
(iii) Form negative ions
(iv) Form basic oxides

(b) 1. Metals usually have 1, 2 or 3 valence electrons
2. Non - metals usually have 5, 6 or 7 valence electrons.

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