Question

The atomic number of two element A and B are 19 and 20 respectively which element exhibits highest metallic property? Write the molecular formula of the compound formed when these element combine with element ''X'' having atomic number 17.

Answer 1

Atomic no. = 19 = potassium = A
atomic no. = 20 = calcium = B
atomic no. = 17 = chlorine = X

potassium (A) has highest metallic property.

AX ,,, BX2

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