Question

Which 2 particles belong to the smae element? ​

Answer 1

A

Step-by-step explanation:

Particles 1 and 2 have the same electronic configuration and same number of protons, therefore they are the same element.

Answer 2

Step-by-step explanation:

option A ..... 1 and 2

....same electronic configuration=same valence electrons=same no. of protons=same atomic no.