The elements A, B, and C belong to groups 1, 14, and 17 respectively of the Periodic Table. Which two elements will form ionic compounds?
- A and B
- A and C
- B and C
- None
Correct Answer: (b) A and C
Explanation: The elements A, B, and C belong to groups 1, 14, and 17 respectively of the Periodic Table. Hence, the valency of A is +1, B is 4 and C is -1. A and C will form an ionic compound since A is alkali metal and C is non-metal (halogen). A will donate its electron to C to achieve a stable electronic configuration.
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