EASY
10th CBSE
IMPORTANT
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According to modern periodic law, the properties of the elements are in periodic function of their . (Atomic number/ Atomic mass)

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Important Questions on Periodic Classification of Elements

HARD
10th CBSE
IMPORTANT
Eduwiser's CBSE Chemistry For Class X>Chapter 5 - Periodic Classification of Elements>Exercise 8>Q 14
The general electronic configuration of transition elements is (n-1)d1-ans1-2. The value of a will be _____. (6, 7, 10)
MEDIUM
10th CBSE
IMPORTANT
Eduwiser's CBSE Chemistry For Class X>Chapter 5 - Periodic Classification of Elements>Exercise 8>Q 15
Separation of a mixture containing compounds of some members of lanthanoids cannot be done by _____ (physical/ chemical) methods.
HARD
10th CBSE
IMPORTANT
Eduwiser's CBSE Chemistry For Class X>Chapter 5 - Periodic Classification of Elements>Exercise 8>Q 17
Elements of 2nd period are known as _____. (typical elements / bridge elements)
MEDIUM
10th CBSE
IMPORTANT
Eduwiser's CBSE Chemistry For Class X>Chapter 5 - Periodic Classification of Elements>Exercise 8>Q 18
The number of transition series in the periodic table is _____.(4/6)
MEDIUM
10th CBSE
IMPORTANT
Eduwiser's CBSE Chemistry For Class X>Chapter 5 - Periodic Classification of Elements>Exercise 8>Q 20
The elements of group 16 are also called as _____.  (Chalcogens / Halogens / Pnictogens)
EASY
10th CBSE
IMPORTANT
Eduwiser's CBSE Chemistry For Class X>Chapter 5 - Periodic Classification of Elements>Exercise 8>Q 21
Highest refractive index is noticed in _____. (platinum / diamond)
MEDIUM
10th CBSE
IMPORTANT
Eduwiser's CBSE Chemistry For Class X>Chapter 5 - Periodic Classification of Elements>Exercise 8>Q 22
The idea of telluric helix for arrangement of elements was given by _____. (Newlands / Chancourtois)
MEDIUM
10th CBSE
IMPORTANT
Eduwiser's CBSE Chemistry For Class X>Chapter 5 - Periodic Classification of Elements>Exercise 8>Q 23
First man made atom is _____.