Electronic configuration of an atom X is (2, 8, 7). It combines with another atom Y having electronic configuration (.., 1).
What type of bond will be formed between X and Y?

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Solution

X = $2, 8, 7$ . It is a non-metal with valency $1$ .
Y = .., $1$ . It is a metal with valency $1$ .
Part 2: Bond formation
X and Y have 7 and 1 electrons in their outermost shells respectively so Y loses its one electron and X gains that electron to attain noble gas configuration. A bond generated by the transfer of electrons from one element atom to another is called an Ionic bond.
So, this atom will form an Ionic bond.

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Electronic configuration of an atom X is (2, 8, 7). It combines with another atom Y having electronic configuration (.., 1).What type of bond will be formed between X and Y?

Electronic configuration of an atom X is (2, 8, 7). It combines with another atom Y having electronic configuration (.., 1).
What type of bond will be formed between X and Y?