Question

There are four different elements along with their atomic numbers: A (9), B (11), C (19) and D (37). Find the odd element from these with respect to their positions in the periodic table?

• A. D
• B. A
• C. C
• D. B

Answer 1

Answer:

B. A

• Elements B, C, and D all belong to Group 1 (the alkali metals). Element A belongs to Group 17 (the halogens).

• Therefore, the odd element with respect to their positions in the periodic table is A (Atomic Number 9)

• Because it belongs to a different group than the other three elements.