EASY
9th CBSE
IMPORTANT
Earn 100

The sum of the total number of protons and neutrons in the nucleus of an atom is called its

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Important Questions on Structure of Atom

EASY
9th CBSE
IMPORTANT
Secondary Chemistry>Chapter 4 - Structure of Atom>Problems for Proficiency>Q 1
Define an orbit.
HARD
9th CBSE
IMPORTANT
Secondary Chemistry>Chapter 4 - Structure of Atom>Problems for Proficiency>Q 2
Draw the orbits around the nucleus.
MEDIUM
9th CBSE
IMPORTANT
Secondary Chemistry>Chapter 4 - Structure of Atom>Problems for Proficiency>Q 3
The energy states is also called energy shell or shell. Write the symbols of shells for first, second and third energy states of an atom.
EASY
9th CBSE
IMPORTANT
Secondary Chemistry>Chapter 4 - Structure of Atom>Problems for Proficiency>Q 4
Write the name of the shell which is closest to the nucleus of the atom. (L shell / M shell / K shell)
MEDIUM
9th CBSE
IMPORTANT
Secondary Chemistry>Chapter 4 - Structure of Atom>Problems for Proficiency>Q 5
Which shell is associated with the lowest energy and which one is associated with the highest energy in K, L, M, and N-shells? 
HARD
9th CBSE
IMPORTANT
Secondary Chemistry>Chapter 4 - Structure of Atom>Problems for Proficiency>Q 6
Calculate the maximum number of electrons (2n2) which can be accommodated in (i) K (ii) L, (iii) M, and (iv) N-shells. 
HARD
9th CBSE
IMPORTANT
Secondary Chemistry>Chapter 4 - Structure of Atom>Problems for Proficiency>Q 7
Write the similarities in electronic configurations of the following pairs: 
(i) Ne and Ar 
(ii) Li and Na 
(iii) Be and Mg 
EASY
9th CBSE
IMPORTANT
Secondary Chemistry>Chapter 4 - Structure of Atom>Problems for Proficiency>Q 8
Write the electronic configuration of an element whose atomic number is 10.