Which of the following subatomic particles can be changed in number without affecting the element identity of the atom?

A) Electrons
B) Protons
C) Neutrons
D) Both "electrons" and "neutrons" are correct.

Subatomic Particles

Constituents such as protons, neutrons, and electrons that make up atoms, the basic units of matter.

Electrons

Negatively charged subatomic particles that orbit the nucleus of an atom, crucial for chemical bonds and electricity.

Protons

Subatomic particles found in the nucleus of an atom, carrying a positive electrical charge, and along with neutrons, contributing to the atomic mass of elements.