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Q.

The atomic number of chlorine is 17. What will be its valency?

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a

2

b

1

c

3

d

4

answer is A.

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Detailed Solution

The atomic number of chlorine is 17 so, the electronic configuration is 2,8,7. This means it has 7 electrons in the outermost shell.

It accepts 1 electron to achieve a stable electronic configuration and complete its octet. So, the valency of chlorine is 1.

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The atomic number of chlorine is 17. What will be its valency?