Classify the following elements as metals, non metals or metalloids: [3 MARKS]
(a) Sn (b) Br (c) Ho (d) Cd (e) Si (f) Xe.

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Solution

Each point: 0.5 Mark

(a) metal
(b) non metal
(c) metal
(d) metal
(e) metalloid
(f) non metal

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(a) What are metalloids? Name two metalloids.

(b) Classify the following elements into metals,non-metals, and metalloids:

Copper, Sulphur, Aluminium, Oxygen, Silicon, Nitrogen, Germanium, Mercury, Chlorine, and Sodium.

The three elements having chemical symbols of Si, B and Ge are :

(a) all metals (b) all non-metals

(a) always metals

(b) always non-metals

(d) either metals or non-metals

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