Question

Can anybody explain me this question how is the answer correct?​

Answer 1

Number of Nuetrons=Atomic mass — no . of protons

=》35-17=18

So it is also right.I think there is a mistake in checking

Answer 2

Explanation:

The question has a misprint. The two ions will be Chlorine-35 and Chlorine-37.

A Chlorine-35 has the following configuration:

Number of Protons 17

Number of Neutrons 18

Number of Electrons 17

A Chlorine-37 has the following configuration:

Number of Protons 17

Number of Neutrons 20

Number of Electrons 17

Hence, third option is the false statement.