1.

(a) The table below compares some properties of metals and non-metals. Write down the missing statements (i) to (iv) :MetalsNon-metals(i) …………………..(ii) Malleable(iii) Form positive ions(iv) …………………Poor conductors of heat…………………………………………Form acidic oxides(b) How many valence electrons are present in:(i) metals and (ii) non-metals?

Answer»

(a)

MetalsNon-metals
(i) Good conductors of heat
(ii) Malleable
(iii) Form positive ions
(iv) Form basic oxides
Poor conductors of heat
Non-Malleable
Forms negative ions
Form acidic oxides

(b) Valence electrons present in:

(i) Metals have 1, 2 or 3 valence electrons.

(ii) Non-metals have 5, 6 or 7 valence electrons



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