a single, negatively-charged nucleus. equal numbers of protons and electrons. "shared" electrons from another atom. a stable number of charged neutrons.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: An atom will always have
Possibilities:
- a single, negatively-charged nucleus.
- equal numbers of protons and electrons.
- "shared" electrons from another atom.
- a stable number of charged neutrons.

equal numbers of protons and electrons.