MEDIUM
10th CBSE
IMPORTANT
Earn 100

In the following table, six elements A, B, C, D, E and F of the modern periodic table with atomic numbers 3 to 18 are given :

3 4 5 6 7 8 9 10
A         E   G
11 12 13 14 15 16 17 18
B C   D     F  

In the compound between B and F what type of bond will be formed?

Important Questions on Periodic Classification of Elements

MEDIUM
10th CBSE
IMPORTANT

In the following table, six elements A, B, C, D, E and F of the modern periodic table with atomic numbers 3 to 18 are given :

3 4 5 6 7 8 9 10
A         E   G
11 12 13 14 15 16 17 18
B C   D     F  

What would be the nature of oxide formed by C?

HARD
10th CBSE
IMPORTANT
An element 'X' has mass number 35 and number of neutrons 18. Write the electronic configuration of 'X' also. Also, write the group number, period number and valency of X.
HARD
10th CBSE
IMPORTANT

Answer the following with reason:

Which element is more metallic: Na or Cl?

HARD
10th CBSE
IMPORTANT

Answer the following with reason:

Which element has smaller size: O or F?

MEDIUM
10th CBSE
IMPORTANT
What are Dobereiner's Triads? Explain giving one example.
HARD
10th CBSE
IMPORTANT
Arrange the elements of group 17 according to increasing order of non-metallic character.
HARD
10th CBSE
IMPORTANT
Arrange the elements of group 17 according to decreasing order of electronegativity.