MEDIUM
9th CBSE
IMPORTANT
Earn 100

How cathode rays are different from anode rays?

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 3
Name the discoveror of electrons, protons and neutrons.
MEDIUM
9th CBSE
IMPORTANT
All In One SCIENCE CBSE Class IX>Chapter 4 - Structure of the Atom>Check Point 01>Q 4
What conclusion would be drawn by Rutherford when he observed that most of the fast-moving α-particles passed straight through the gold foil?
MEDIUM
9th CBSE
IMPORTANT
All In One SCIENCE CBSE Class IX>Chapter 4 - Structure of the Atom>Check Point 01>Q 5
Nucleus of an atom is positively charged and electrons around it are negatively charged. Then why do electrons not just fall to the nucleus out of attraction?
EASY
9th CBSE
IMPORTANT
All In One SCIENCE CBSE Class IX>Chapter 4 - Structure of the Atom>Check Point 01>Q 6
What do you understand by the term ‘discrete orbit’?
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?