Q. The number of elements present in fifth period of periodic table is :
AFMCAFMC 2003
Solution:
Horizontal rows of periodic table are called periods. Modern periodic table has seven periods.
I period
-
2 elements
II period
-
8 elements
III period
-
8 elements
IV period
-
18 elements
V period
-
18 elements
VI period
-
32 elements
VII period
-
In complete
| I period | - | 2 elements |
| II period | - | 8 elements |
| III period | - | 8 elements |
| IV period | - | 18 elements |
| V period | - | 18 elements |
| VI period | - | 32 elements |
| VII period | - | In complete |