There are three stable forms of neon-20, neon-21, neon-22. Which statement is true?

Question

A. They are radioactive, like all isotopes
B. Their atomic masses differ
C. Their number of protons differ
D. The number of neutrons are the same

Answer 1

The correct statement is:

B. Their atomic masses differ

Explanation:

• Neon-20, Neon-21, and Neon-22 are isotopes of neon that have different numbers of neutrons, which leads to different atomic masses.
• Statement A is incorrect because neon isotopes are stable and not radioactive.
• Statement C is incorrect because all isotopes of neon have the same number of protons (10 protons).
• Statement D is incorrect as the number of neutrons differs among the isotopes: Neon-20 has 10 neutrons, Neon-21 has 11 neutrons, and Neon-22 has 12 neutrons.