Question

1. which of the following is a member of noble gases? (1pts)

□ chlorine
□ oxygen
□ nitrogen
□ krypton

1. which of the following is a cation? (1pts)

Explanation:

Noble gases are inert elements in Group 18 of the periodic table. Chlorine is a halogen (Group 17), oxygen is a chalcogen (Group 16), nitrogen is a pnictogen (Group 15), while krypton is in Group 18, making it a noble gas.

Answer:

□ chlorine
□ oxygen
□ nitrogen
☑ krypton