NEET Chemistry: Chemistry - Periodic Classification of Elements questions with solutions

Q1. Elements with atomic numbers 9,17,35 53 are collectively known as:

1. chalcogens
2. halogens
3. lanthanides
4. rare gases

Answer: halogens

Atomic numbers 9, 17, 35, and 53 correspond to fluorine, chlorine, bromine, and iodine. These are Group 17 elements, collectively called the halogens.