Question

identify the reason for the decrease of atomic. (a) new shells are being added which increase the distance between outermost electrons and nucleus. (b) increase in nucleus charge tends to pull electron closer to the nucleus. (c) electro negativity increase from left to right in period. (d) valency is different for all elements in the group​

Answer 1

Answer:

Explanation:

WHY? - As you move across a period, the atomic radius decreases, that is, the atom is smaller. The outer electrons are closer to the nucleus and more strongly attracted to the center. Therefore, it becomes more difficult to remove the outermost electron.