The mass of the atom increases. The atom becomes an isotope. The atomic number decreases. The atom becomes a positive ion.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: A bond is formed when an electron is transferred from a sodium atom to a chlorine atom. What happens to the sodium atom during this process?
Possibilities:
- The mass of the atom increases.
- The atom becomes an isotope.
- The atomic number decreases.
- The atom becomes a positive ion.

The atom becomes a positive ion.