JEE Main Chemistry question
A diatomic molecule is formed by the element at serial number (1) and the element at serial number : (1) (2) (3) (4) (5) (6)
Answer: 4
Solution
Element (1), , is aluminium with valency (loses 3 electrons). For a simple 1:1 "diatomic" (one atom of each element) ionic compound to form, the partner element must have a valency of exactly so the charges balance exactly. Element (4), , is nitrogen, which needs exactly 3 more
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