An atom has 2 protons,2 neutrons,and 2 electrons; it has an atomic
A)number of 6.
B)mass of 2.
C)mass of 4.
D)number of 4.

Question

Quizplus · Accepted Answer

The atomic mass is the sum of the number of protons and neutrons in an atom. In this case, the atom has 2 protons and 2 neutrons, giving it a mass of 4. Since the number of electrons is equal to the number of protons, the atomic number is also 2. Therefore, the correct choice is C, which matches the mass of the atom.

An Atom Has 2 Protons,2 Neutrons,and 2 Electrons; It Has