Question

what subatomic particle gives an atom its identity?
○nucleus
○protons
○electrons
○neutrons
question 8 1 pts
which subatomic particles makes up the mass number of an atom?
○electrons and neutrons
○protons and electrons
○protons and neutrons

Explanation:

1. For the first question: The atomic number (number of protons) defines the element an atom belongs to, so protons give an atom its identity.
2. For the second question: The mass number of an atom is calculated as the sum of protons and neutrons in the nucleus, as electrons have negligible mass compared to these two particles.

Answer:

1. Protons
2. Protons and Neutrons