EASY
10th CBSE
IMPORTANT
Earn 100

How many periods and groups are there in the long form of periodic table?

Important Questions on Periodic Classification Of Elements

EASY
10th CBSE
IMPORTANT
In the modern periodic table, which are the metals among first ten elements?
MEDIUM
10th CBSE
IMPORTANT
What is the significance of the atomic number in the modern classification of elements. Explain with the help of an example.
MEDIUM
10th CBSE
IMPORTANT
How were the positions of isotopes of an element decided in the modern periodic table?
EASY
10th CBSE
IMPORTANT
How were the positions of cobalt and nickel resolved in the modern periodic table?
EASY
10th CBSE
IMPORTANT
Where should hydrogen be placed in the modern periodic table? Give a reason for your answer.