Question

In an electrically neutral atom of any element, there are equal numbers of A) protons and neutrons.
B) electrons and protons.
C) electrons and neutrons.
D) atomic number and atomic mass.

Answer 1

B.
Protons have +1 positive charge.
Neutrons have no charge
Electrons have -1 charge.

Equal number of protons and electrons will balance out the positive and negative charges so an atom is neutral.

Answer 2

The answer is B because in an electrically stable atom of any element, there are equal numbers of electrons and protons, because each electron has a negative charge and each proton has a positive charge.