question 13\nwhere is most of the mass of an atom concentrated?\na nucleus\nb neutrons\nc protons\nd…

question 13\nwhere is most of the mass of an atom concentrated?\na nucleus\nb neutrons\nc protons\nd orbitals\ne electrons

question 13\nwhere is most of the mass of an atom concentrated?\na nucleus\nb neutrons\nc protons\nd orbitals\ne electrons

Answer

Brief Explanations:

An atom consists of a nucleus containing protons and neutrons, and electrons in orbitals. Protons and neutrons have much greater mass than electrons. The nucleus, which holds protons and neutrons, is where most of the atom's mass is concentrated.

Answer:

A. nucleus