There are three stable forms of neon: neon-20, neon-21, and neon-22. Which statement is true? (1 point)

Question

Their atomic masses differ.

They are radioactive, like all isotopes.

Their number of protons differ.

The number of neutrons are the same.

Answer 1

The true statement among the options provided is:

Their atomic masses differ.

Neon-20, neon-21, and neon-22 have different numbers of neutrons, which means their atomic masses are different. Specifically, neon-20 has 10 neutrons, neon-21 has 11 neutrons, and neon-22 has 12 neutrons.

The other statements are not correct because:

• While they are isotopes, only neon-21 and neon-22 are not stable, so it's not true that all isotopes are radioactive.
• The number of protons is the same for all three isotopes (10 protons).
• The number of neutrons does not remain the same; it varies between the isotopes.