Question

Four elements P, Q , R and S have atomic number 12, 13 ,14 and 15 respectively.

7.Answer the followings:

i)What is the valency of Q?

ii) Classify this element as metals and nonmetals.

iii) Which two elements have same valency?

Answer 1

Answer:

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Explanation:

1) Valency of Q is 3

2) these are metals

3)P and R have the same valency (4)

Answer 2

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