MEDIUM
8th CBSE
IMPORTANT
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Identify the electronic configuration of manganese Z=25.

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Important Questions on Atomic Structure

EASY
8th CBSE
IMPORTANT
Pearson IIT Foundation Chemistry>Chapter 1 - Atomic Structure>PRACTICE QUESTIONS (COMPETITION WING)>Q 42
Which among the following set of elements contain same number of valence electrons?
EASY
8th CBSE
IMPORTANT
Pearson IIT Foundation Chemistry>Chapter 1 - Atomic Structure>PRACTICE QUESTIONS (COMPETITION WING)>Q 43
The atoms of the same element may differ in the number of _____.
MEDIUM
8th CBSE
IMPORTANT
Pearson IIT Foundation Chemistry>Chapter 1 - Atomic Structure>PRACTICE QUESTIONS (COMPETITION WING)>Q 44

Assertion (A): Electrons present in ground states of different single electron species H, He+, Li++ possess different amounts of energy.

Reason (R): Distances of electrons from the nuclei of different single electron species are equal.

MEDIUM
8th CBSE
IMPORTANT
Pearson IIT Foundation Chemistry>Chapter 1 - Atomic Structure>PRACTICE QUESTIONS (COMPETITION WING)>Q 45
Identify the atomic number corresponding to least number of valence electrons.
MEDIUM
8th CBSE
IMPORTANT
Pearson IIT Foundation Chemistry>Chapter 1 - Atomic Structure>PRACTICE QUESTIONS (COMPETITION WING)>Q 46
An atom of an element has mass number 31. It has 16 neutrons. The valence shell and the number of valence electrons, respectively, could be
MEDIUM
8th CBSE
IMPORTANT
Pearson IIT Foundation Chemistry>Chapter 1 - Atomic Structure>PRACTICE QUESTIONS (COMPETITION WING)>Q 47
The number of electrons present in each α-particle is 
EASY
8th CBSE
IMPORTANT
Pearson IIT Foundation Chemistry>Chapter 1 - Atomic Structure>PRACTICE QUESTIONS (COMPETITION WING)>Q 48
An atom of an element has two electrons in the valence shell and two consecutive inner shells have 8 electrons each. Calculate atomic number of element.
MEDIUM
8th CBSE
IMPORTANT
Pearson IIT Foundation Chemistry>Chapter 1 - Atomic Structure>PRACTICE QUESTIONS (COMPETITION WING)>Q 49
Rutherford's theory assumed which of the following paths for the electrons?