The elements of the second period along with their atomic numbers in parentheses are given below: B (5), Be (4), O (8), N (7), Li (3), C (6), F (9) Why does atomic radius change as we move from left to right in a period?
Along a period, the nuclear charge increases and the electrons are attracted more towards the nucleus. Therefore, the atomic size or atomic radius decreases as we move from left to the right along a period.
