Which of the following subatomic particles have a mass of approximately 1 amu?

I. protons
II. neutrons
III. electrons
A.
I and III only
B.
I, II, and III
C.
I only
D.
I and II only

Answer: D

yes

The subatomic particles that have a mass of approximately 1 amu are protons and neutrons. Therefore, the correct answer is D) I and II only, which means protons and neutrons. Electrons have a much smaller mass compared to protons and neutrons.

To determine which subatomic particles have a mass of approximately 1 amu, we need to understand the masses of these particles. Here's a breakdown:

I. Protons: Protons have a mass of approximately 1 amu.

II. Neutrons: Neutrons also have a mass of approximately 1 amu.

III. Electrons: Electrons have a significantly smaller mass compared to protons and neutrons. They are roughly 1/1836th the mass of a proton, so their mass is negligible in comparison to 1 amu.

Based on this information, the correct answer is D) I and II only. Both protons and neutrons have a mass of approximately 1 amu, while electrons have a negligible mass in comparison.

yes