(a) What are (i) metals (ii) non-metals, and (iii) metalloids ?

Give two examples each of metals, non-metals and metalloids.

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

Silicon, Mercury, Diamond, Sulphur, Iodine, Germanium, Sodium, Carbon, Magnesium, Copper, Boron, Helium

(i) Metals: Metals are elements that are malleable, ductile and conduct electricity.
Examples: Aluminum and zinc

(ii) Non-metals: Non-metals are elements that are neither malleable nor ductile, and they do not conduct electricity. Most non-metals are brittle in nature.
Examples: Phosphorus, hydrogen

(iii) Metalloids: Metalloids are elements that show properties of both metals and non metals.
Examples: Germanium, silicon

(b).
(i) Metals: Mercury, sodium, magnesium, copper
(ii) Non-metals: Diamond, sulphur, iodine, carbon, helium
(iii) Metalloids: Arsenic, germanium, boron