Write the electronic configuration of the element with atomic number 17. Indicate the valency of the element.

Academic Chemistry NCERT Class 9

The atomic number is 17

The no. of protons and no. of electrons is 17.

The electronic configuration is:

K L M

2 8 7

The outermost orbit has 7 electrons.

In order to make it 8, the element will have to gain 1 electron. So, the valency of the element is 1.

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Updated on: 10-Oct-2022

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