1.

Match the atomic numbers 4, 14, 8, 15, and 19 with each of the following : (a) A solid non-metal of valency 3. (b) A gas of valency 2. (c) A metal of valency 1. (d) A non-metal of valency 4.

Answer»

Match the atomic numbers 4, 14, 8, 15, and 19 with each of the following :

(a) A solid non-metal of valency 3.

(b) A gas of valency 2.

(c) A metal of valency 1.

(d) A non-metal of valency 4.



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