Among the alkali metals, the tendency to react with other substances. A. does not vary among the members of the group. . B. incr
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Try this solution, all the details are described in the attached picture.
It depends on the number of valence electrons required to make octet or duplet( in case of H). For example, Nitrogen(atomic number = 7) has electronic configuration(2,5) which means nitrogen has 5 valence electrons and requires 3 more electrons to complete its octet. After gaining 3 electrons from atoms of an element with less electronegativity than N, it forms nitride ion (
). Hope this helps.