Question

metals show tendency to form positive ions while non metals form negative ions explain the reason for it

Answer 1

electron revolve around the nucleus in the specific orbit of this the electron in the outer most orbit take part in chemical reaction if the outer most orbit is incomplete that is if it can hold more electron then there is a possibility of sharing of electron during chemical reaction metal tend to give and non metal tend to receive

Answer 2

metals are larger in size and the outermost electron are far from nucleus and to attain noble gases configuration they reduce electron easily while in non metal outermost electron are closer to nucleus and nuclear charge is greater and their electronegativity is greater hence therefor to attain noble gases configuration they easily gain electron