Question

The atomic weight of an atom is the sum of the mass of the particles in the nucleus of the atom. These particles are called?

a) electrons and neutrons
b) electrons and protons
c) neutrons and protons
d) electrons, protons, and neutrons

Answer 1

c) neutrons and protons

Step-by-step explanation:

The nucleus of the atom contains only neutrons and protons. Electrons are not in the nucleus but outside the nucleus in 'atomic orbitals'.