Question

the atomic number of an element 17 .it's period group and block are ......,.....and....... respectively​

Answer 1

Answer:

the atomic number of an chlorine is 17

It belong to 3rd period

Group 17 and p block...

Explanation:

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Answer 2

Answer:

Group - 17

Period - 3

Valency - 1

the element is chlorine

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