Question

question 40 (1 point) listen and are solid halogen and gaseous noble element respectively. 1) b and k 2) ba and kr 3) i and kr 4) br and ar

Explanation:

To solve this, we analyze each option:

• Option 1: B (Boron) is not a halogen, K (Potassium) is not a noble gas. Eliminate.
• Option 2: Ba (Barium) is an alkaline earth metal, not a halogen. Kr (Krypton) is a noble gas, but Ba is incorrect. Eliminate.
• Option 3: I (Iodine) is a halogen and is solid at room temperature. Kr (Krypton) is a noble gas and is gaseous. This fits.
• Option 4: Br (Bromine) is a halogen but is liquid, not solid. Ar (Argon) is a noble gas. But Br's state is wrong. Eliminate.

Answer:

1. I and Kr