Question

Atomic number of chlorine atom 17. What is the atomic number of cl-

Answer 1

Answer:

Explanation:

It is known that:

       Atomic number is the number of protons in the nucleus.

Atomic number of Cl is 17.

In case of Cl-  :

       There is one more electron in the shell due to which charge on chlorine is negative and it now called as ion.

But there is no change of proton in Cl-,too.

So,the atomic number of Cl- is also 17.

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Answer 2

Answer:

Explanation:

Atomic number remains same

Means it will be 17