Question

1. what of the following determines an atom’s identity?

a. protons
b. neutrons
c. electrons
d. nucleus

Explanation:

The number of protons in an atom's nucleus, known as the atomic number, determines the element and thus the atom's identity. Neutrons affect isotopes, electrons are involved in chemical bonding, and the nucleus contains protons and neutrons but it's the proton - count that defines the atom.

Answer:

A. Protons