Question

First three periods in periodic table are:
a) Long b) Short c) Moderate d) None​

Answer 1

they are Short............

Answer 2

Answer:

In the periodic table, the first three periods are short. Option b) is correct.

Explanation:

• In the periodic table, the atomic number of an element is the basis of the arrangement.
• Vertical columns are the groups and horizontal rows are the periods in the periodic table.

The chemical properties of the elements are similar in the same group. Only two elements are there in the first row of the periodic table. The second row consists of eight elements. The third row consists of eight elements.

So, in the periodic table, the first three periods are short.

Option b) is correct.