Give the half-equation for the reaction at the anode, during
the electrolysis of these molten compounds:
a: potassium chloride
b: calcium oxide

The answer would be B

☆ionisation energy increases across a period from na -> ar☆ionisation energy decreases down a group from li -> fr☆ionic radius decreases across a period from na -> cl☆ionic radius increases down a groupfrom f -> ii hope it clarifies your doubts