Question

how does the tendency of am atom to lose electrons vary in a period

Answer 1

ACROSS PERIOD THE ELECTROSTATIC FORCE OF ATTRACTION BETWEEN NUCLEUS AND ELECTRONS IS MORE SO IT DOES NOT LOOSE THEIR ELECTRONS EASILY AND THAT'S WHY THEIR SIZE DECREASES ACROSS PERIOD.

Answer 2

The tendency to lose electronsincreases when we move from top to bottom in a group. This is because theatomic size of the atoms increases doesn't the group and the valence shellelectrons increases due to which the nuclear power which the electroncloser to the nucleus decreases