MEDIUM
10th CBSE
IMPORTANT
Earn 100

Third group of the periodic table accommodates maximum number of elements.

50% studentsanswered this correctly

Important Questions on Periodic Classification of Elements

EASY
10th CBSE
IMPORTANT
Eduwiser's CBSE Chemistry For Class X>Chapter 5 - Periodic Classification of Elements>Exercise 7>Q 19
Mendeleev's periodic law was based on atomic number of the elements.
EASY
10th CBSE
IMPORTANT
Eduwiser's CBSE Chemistry For Class X>Chapter 5 - Periodic Classification of Elements>Exercise 7>Q 20
Zero group was not present in the table when Mendeleev presented it.
EASY
10th CBSE
IMPORTANT
Eduwiser's CBSE Chemistry For Class X>Chapter 5 - Periodic Classification of Elements>Exercise 7>Q 21
Every period of the periodic table starts with a member of alkali metal group.
HARD
10th CBSE
IMPORTANT
Eduwiser's CBSE Chemistry For Class X>Chapter 5 - Periodic Classification of Elements>Exercise 7>Q 22
The d-block elements have fixed valency.
HARD
10th CBSE
IMPORTANT
Eduwiser's CBSE Chemistry For Class X>Chapter 5 - Periodic Classification of Elements>Exercise 7>Q 23
In the lanthanoid series the electrons occupy 4f- orbitals in preference of 5d- and 6p- orbitals.
MEDIUM
10th CBSE
IMPORTANT
Eduwiser's CBSE Chemistry For Class X>Chapter 5 - Periodic Classification of Elements>Exercise 7>Q 24
Seventh period of periodic table is incomplete.
EASY
10th CBSE
IMPORTANT
Eduwiser's CBSE Chemistry For Class X>Chapter 5 - Periodic Classification of Elements>Exercise 7>Q 25
First period contains only 2 elements.
EASY
10th CBSE
IMPORTANT
Eduwiser's CBSE Chemistry For Class X>Chapter 5 - Periodic Classification of Elements>Exercise 7>Q 26
Most of the elements are metals.