3 elements A,B and C belong to the groups 1,14 and 17 respectively. 1. which 2 elements will form covalent bond? 2. which 2 elements will form ionic bond?

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Solution

1. Element A and B will form covalent forms. A requires one one electron in its valence while B requires 4, so it will combine with 4 atoms of A to form BH₄.
2. Element A and C will form ionic bonds as the electronegativity difference between the two is huge and will make the bond between A and C ionic.

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