HARD
9th CBSE
IMPORTANT
Earn 100

Define isotopes. What are the essential characteristics of isotopes? Give important applications of isotopes.

Important Questions on Structure of Atom

HARD
9th CBSE
IMPORTANT

Give important differences between:

Canal rays and cathode rays

MEDIUM
9th CBSE
IMPORTANT
Give important differences between: 
Atomic number and mass number.

 
MEDIUM
9th CBSE
IMPORTANT
Give important differences between: 
Isotopes and isobars
EASY
9th CBSE
IMPORTANT
Name the scientist who showed the existence of protons in an atom.
EASY
9th CBSE
IMPORTANT
Name the isotope which is used in the treatment of cancer. 
MEDIUM
9th CBSE
IMPORTANT
Which of the two has larger mass: electron or proton?
EASY
9th CBSE
IMPORTANT
If Z = 3, what would be the valency of the element? Also name the element.