Question

17. (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, Sodium.

Answer 1

Answer:

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Answer 2

a) A metalloid is an element that has properties that are intermediate between those of metals and nonmetals. Metalloids can also be called semi–metals. On the periodic table, the elements colored yellow, which generally border the stair-step line, are considered to be metalloids.

Boron, silicon, germanium, arsenic, antimony, and tellurium are commonly recognised as metalloids.

b) Copper→ Metal

Sulphur→ Non metal

Aluminium→Metal

Oxygen→ Non metal

Silicon→ Metalloid

Nitrogen→Non metal

Germanium→Metalloid

Mercury→Metal

Chlorine→Non metal

Sodium→Metal