An electron is approximately 0.05% of the mass of a proton. Protons and neutrons each have a mass of 1 amu. Which of the following best describes the relationship between mass and subatomic particles?
A. The mass of an electron is equal to that of a neutron
B. Atomic mass is the total number of protons and electrons
C. A neutron has 0.05% more mass than an electron
D. The nucleus comprises over 99% of the atom's mass

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dsdrajlin dsdrajlin · Answer 1 · 2020-09-04T02:27:29+02:00

Answer:

D. The nucleus comprises over 99% of the atom's mass.

Explanation:

Which of the following best describes the relationship between mass and subatomic particles?

A. The mass of an electron is equal to that of a neutron. FALSE. The mass of an electron is ≈1/1,840 of that of a neutron.

B. Atomic mass is the total number of protons and electrons. FALSE. Atomic mass is the total number of protons and neutrons.

C. A neutron has 0.05% more mass than an electron. FALSE. A neutron has 0.05% more mass than a proton.

D. The nucleus comprises over 99% of the atom's mass. TRUE. The nucleus comprises protons and neutrons.