Question

Which of the following statements does not describe the structure of an atom?

a) Electrons are negatively charged particles.
b) Inside the nucleus of an atom are protons and neutrons.
c) Protons are positively charged subatomic particles.
d) Most of the mass of an atom comes from the electron cloud.

Answer 1

The mass of an atom is primarily concentrated in the nucleus, which is composed of protons and neutrons. The electron cloud, on the other hand, is negligible in terms of mass.

Step-by-step explanation:

The statement that does not describe the structure of an atom is option d) Most of the mass of an atom comes from the electron cloud.

The mass of an atom is primarily concentrated in the nucleus, which is composed of protons and neutrons. The electron cloud, on the other hand, is negligible in terms of mass. It is the protons and neutrons in the nucleus that contribute most to the atomic mass.