EASY
10th CBSE
IMPORTANT
Earn 100

An element X of group 15 exists as diatomic molecule and combines with hydrogen at 773 K in presence of the catalyst to form a compound, ammonia which has a characteristic pungent smell.

Identify the element X. How many valence electrons does it have?

Important Questions on Periodic Classification of Elements

EASY
10th CBSE
IMPORTANT

An element X of group 15 exists as diatomic molecule and combines with hydrogen at 773 K in presence of the catalyst to form a compound, ammonia which has a characteristic pungent smell.

Draw the electron dot structure of the diatomic molecule of X. What type of bond is formed in it?

MEDIUM
10th CBSE
IMPORTANT

An element X of group 15 exists as diatomic molecule and combines with hydrogen at 773 K in presence of the catalyst to form a compound, ammonia which has a characteristic pungent smell.

Draw the electron dot structure for ammonia and what type of bond is formed in it?

EASY
10th CBSE
IMPORTANT
Which group of elements could be placed in Mendeleev's periodic table without disturbing the original order? Give reason.
EASY
10th CBSE
IMPORTANT
Give an account of the process adopted by Mendeleev for the classification of elements. How did he arrive at "periodic law"?