What would be the charge on an ion whose neutral atom has an electron configuration of 2.8.7? A. +1
B. 0
C. +7
D. -1

Ci think not

☆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