They are noble (inert) gases. They are nonmetals. They have the same thermal conductivity. They have the same number of protons.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: What do the elements sulfur (S), nitrogen (N), phosphorus (P), and bromine (Br) have in common?
Possibilities:
- They are noble (inert) gases.
- They are nonmetals.
- They have the same thermal conductivity.
- They have the same number of protons.

They are nonmetals.