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