Question

how would you justify the presence of 18 elements in the 5th period of the periodic table ??????​

Answer 1

Answer:

Acceleration, rate at which velocity changes with time, in terms of both speed and direction. A point or an object moving in a straight line is accelerated if it speeds up or slows down.

Answer 2

5 th period in the periodic table has

S-block

S-block P-block

S-block P-blockD-block element

Hence max. no. of electrons Accomodated by s, p & d sublevels = no. of elements in that period = 18 (2+ 6+10).