Question

Write the formulae of compound regulating from the combination of an element ‘X’ of atomic number 19 with the element Y of atomic number 17.​

Answer 1

Answer:

Ionic bond.

A = K (Potassium), B = Cl (Chlorine)

Ionic bond will be formed between Chlorine and Potassium (Cl and K)

Answer 2

Element 'X' = Potassium (K)

Element 'Y' = Chlorine (Cl)

Formula of compound formed

K $+1$        Cl $-1$

criss cross , we get

⇒KCl

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