MEDIUM
9th CBSE
IMPORTANT
Earn 100

The atomic number and the mass number of certain elements are given below in the table.
Element A B C D E F
Atomic number 1 3 8 18 20 1
Mass number 2 7 16 40 40 1

Select a pair of isobar and isotope from the above table.

Important Questions on Structure of the Atom

EASY
9th CBSE
IMPORTANT
All In One SCIENCE CBSE Class IX>Chapter 4 - Structure of the Atom>CHAPTER EXERCISE>Q 23
The atomic number and the mass number of certain elements are given below in the table.
Element A B C D E F
Atomic number 1 3 8 18 20 1
Mass number 2 7 16 40 40 1

What would be the valency of elements B and E.
MEDIUM
9th CBSE
IMPORTANT
All In One SCIENCE CBSE Class IX>Chapter 4 - Structure of the Atom>CHAPTER EXERCISE>Q 24
What are the features and drawbacks of Rutherford's nuclear model of an atom?
EASY
9th CBSE
IMPORTANT
All In One SCIENCE CBSE Class IX>Chapter 4 - Structure of the Atom>CHAPTER EXERCISE>Q 25
How did discovery of protons take place?
EASY
9th CBSE
IMPORTANT
All In One SCIENCE CBSE Class IX>Chapter 4 - Structure of the Atom>CHAPTER EXERCISE>Q 25
Why do helium, neon and argon have zero valency?
EASY
9th CBSE
IMPORTANT
All In One SCIENCE CBSE Class IX>Chapter 4 - Structure of the Atom>CHAPTER EXERCISE>Q 26
What are inert elements? Why are they called so?
EASY
9th CBSE
IMPORTANT
All In One SCIENCE CBSE Class IX>Chapter 4 - Structure of the Atom>CHAPTER EXERCISE>Q 26
What is the valency of inert gas elements and why?
EASY
9th CBSE
IMPORTANT
All In One SCIENCE CBSE Class IX>Chapter 4 - Structure of the Atom>CHAPTER EXERCISE>Q 26
How many electrons can be accommodated in a M and N-shell?
MEDIUM
9th CBSE
IMPORTANT
All In One SCIENCE CBSE Class IX>Chapter 4 - Structure of the Atom>CHAPTER EXERCISE>Q 27
Draw the atomic structures of the following elements: Magnesium, silicon, sulphur.