Question

10. The number of electrons in Cl-ion is
(a) 19
(h) 20 (c) 18
(d) 35​

Answer 1

Explanation:

Question

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Number of valence electrons in Cl

−

Correct option is B)

The electronic configuration of chlorine is 2, 8, 7 (Atomic number-17).

Cl

−

is formed from adding one electron so the new electronic configuration is 2, 8, 8.

An atom has an atomic number of 13 and a mass number of 27. How many electrons will it have in its valence shell?

Medium

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The number of electrons present in the valence shell of an atom with atomic number 38 is :

Medium

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