Which element has the most metallic characteristics? O Selenium (Se)
Arsenic (As)
O Germanium (Ge)
O Gallium (Ga)

☆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