Which of the following best describes the classification of krypton on the periodic table?

• A. Krypton is a transition metal.
• B. Krypton is a noble gas.
• C. Krypton is a halogen.
• D. Krypton is an alkali metal.

Answer: (B)

Verified step by step guidance

1. Identify the position of krypton on the periodic table. Krypton has the atomic number 36 and is located in group 18.
2. Recall the characteristics of group 18 elements, which are known as noble gases. These elements are inert, nonmetals with full outer electron shells.
3. Understand that transition metals are found in groups 3 through 12 and typically have partially filled d orbitals, which krypton does not have.
4. Recognize that halogens are in group 17 and are highly reactive nonmetals, which does not describe krypton.
5. Note that alkali metals are in group 1 and are highly reactive metals, which also does not apply to krypton.