Write the formula of the product formed when the element A

Write the formula of the product formed when the element A (atomic number 19) combines with the element B (atomic number 17). Draw its electronic dot structure. What is the nature of the bond formed ?

Ionic bond.

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

what will be its formula?

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

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A: potassium
1s2 2s2 2p6 3s2 3p6 4s1

B:chlorine
1s2 2s2 2p6 3s2 3p5
××cl×
××
P××cl××
×

Ionic bond is formed
1 bond pair
1 lone pair
1 unpaired electron