For an element, Z = 9. The valency of this element will be :(a) 4 (b) 2 (c) 1 (d) 3

Academic Chemistry NCERT Class 9

Correct Answer: (c) 1

Explanation: Atomic number is 9, which means that number of electrons is also 9. Electronic configuration is 2 , 7. So, the atom will gain 1 electron to complete its octet. Therefore, the valency is 1.

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Updated on: 10-Oct-2022

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