EASY
9th CBSE
IMPORTANT
Earn 100

Write the name of the shell which is closest to the nucleus of the atom. (L shell / M shell / K shell)

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Important Questions on Structure of Atom

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.
HARD
9th CBSE
IMPORTANT
Secondary Chemistry>Chapter 4 - Structure of Atom>Problems for Proficiency>Q 9

Select the elements which have 7 electrons in their outermost shells. 

(i) F (9) (ii) Ne(10)  (iii) Mg (12)   (iv) Cl(17) (v) N (7) (vi) P (15)  

 

HARD
9th CBSE
IMPORTANT
Secondary Chemistry>Chapter 4 - Structure of Atom>Problems for Proficiency>Q 10

Write the electronic configuration of each element represented by symbols A, B, C and D in the following table. 

Element Atomic number Electronic configuration
A 16  
B 18  
C 13  
D 17  

State which of A, B, C and D represent: (i) metal, (ii) non-metal and (iii) noble gas

HARD
9th CBSE
IMPORTANT
Secondary Chemistry>Chapter 4 - Structure of Atom>Problems for Proficiency>Q 11

Complete the following table of elements A, B, C and D where, B represents neon.

Element Atomic number Electronic configuration Number of electrons in the outermost shell
A Z-1    
B Z=10    
C Z + 2    
D Z + 3    
EASY
9th CBSE
IMPORTANT
Secondary Chemistry>Chapter 4 - Structure of Atom>Problems for Proficiency>Q 12
In an atom, the electrons move in a circular path called _____.