have the same number of protons. share the same atomic structure. have similar physical characteristics. share the same number of neutrons.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Elements in the same column of the Periodic Table of the Elements all
Possibilities:
- have the same number of protons.
- share the same atomic structure.
- have similar physical characteristics.
- share the same number of neutrons.

have similar physical characteristics.