231
Question
Match the atomic number 4, 8, 14, 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.
Match the atomic number 4, 8, 14, 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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Solution
Answers a)15 b)8 c)19 d)14
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