Question

what part of an atom is involved in a chemical reaction?
○ proton
○ neutron
○ nucleus
○ electron

Explanation:

In a chemical reaction, the nucleus (containing protons and neutrons) remains unchanged. Chemical reactions involve the rearrangement of atoms through the transfer or sharing of electrons. Protons and neutrons are in the nucleus and do not participate in chemical reactions. Electrons, especially the valence electrons (outer - shell electrons), are involved in forming chemical bonds during reactions.

Answer:

D. electron (assuming the options are labeled A - D as proton, neutron, nucleus, electron respectively)