EASY
9th CBSE
IMPORTANT
Earn 100

Define an orbit.

Important Questions on Structure of Atom

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.
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