EASY
9th CBSE
IMPORTANT
Earn 100

What do you understand by the term ‘discrete orbit’?

Important Questions on Structure of the Atom

MEDIUM
9th CBSE
IMPORTANT
All In One SCIENCE CBSE Class IX>Chapter 4 - Structure of the Atom>Check Point 01>Q 7
Draw a sketch of Bohr’s model of an atom with four shells.
EASY
9th CBSE
IMPORTANT
All In One SCIENCE CBSE Class IX>Chapter 4 - Structure of the Atom>Check Point 02>Q 1
What can be the maximum number of electrons in the outermost orbit?
MEDIUM
9th CBSE
IMPORTANT
All In One SCIENCE CBSE Class IX>Chapter 4 - Structure of the Atom>Check Point 02>Q 2
Find out the number of electrons present in last shell of an atom having atomic number  15.
MEDIUM
9th CBSE
IMPORTANT
All In One SCIENCE CBSE Class IX>Chapter 4 - Structure of the Atom>Check Point 02>Q 3
In an atom first four shells (K, L, M and N) are completely filled. Then what is the total number of electrons in that atom?
EASY
9th CBSE
IMPORTANT
All In One SCIENCE CBSE Class IX>Chapter 4 - Structure of the Atom>Check Point 02>Q 4
Why helium and neon do not take part in chemical reactions?
EASY
9th CBSE
IMPORTANT
All In One SCIENCE CBSE Class IX>Chapter 4 - Structure of the Atom>Check Point 02>Q 5
A non-metal has 6 electrons in its outermost shell. Predict its valency.
MEDIUM
9th CBSE
IMPORTANT
All In One SCIENCE CBSE Class IX>Chapter 4 - Structure of the Atom>Check Point 03>Q 1
What are the number of protons, neutrons, and electrons in O816 and Ar1840? What are their atomic number and mass number?
MEDIUM
9th CBSE
IMPORTANT
All In One SCIENCE CBSE Class IX>Chapter 4 - Structure of the Atom>Check Point 03>Q 2
The atomic numbers of Al and Cl are 13 and 17 respectively. What will be the number of electrons in Al3+and Cl-?