For an element x, it is given that atomic number = 17 and mass number =35. Write the electronic configuration of the element x. Find its valency. Is it a metal;or non metal

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Solution

Dear student,
The electronic configuration:

Atomic no. K L M

17 2 8 7

As the valence shell has 7 electrons
Therefore, valency = 8-7=1
The above element is a Non-metal because it has more than 3 electrons in it's valence shell.
Regards

Atomic no.	K	L	M
17	2	8	7

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