Question

difference between long period and short period in modern periodic table

Answer 1

The difference between short period and long period is based upon the number of elements in each period. There are two short periods in the periodic table- the 2^nd period and the 3^rd period. Both these contain eight elements only. The long periods are the 4^th period and the 5^th period. Both these contain 18 elements each.

The shortest period is the first period which contains two elements, while the longest period is the 6^th period which contains 32 elements.