EASY
9th CBSE
IMPORTANT
Earn 100

Helium atom has an atomic mass of 4u and two protons in its nucleus. How many neutrons does it have?

Important Questions on Structure of the Atom

MEDIUM
9th CBSE
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS IX>Chapter 4 - Structure of the Atom>Questions>Q 1
What are canal rays?
EASY
9th CBSE
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS IX>Chapter 4 - Structure of the Atom>Questions>Q 2
If an atom contains one electron and one proton, will it carry any charge or not?
MEDIUM
9th CBSE
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS IX>Chapter 4 - Structure of the Atom>Questions>Q 1
On the basis of Thomson's model of an atom, explain how the atom is neutral as a whole.
EASY
9th CBSE
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS IX>Chapter 4 - Structure of the Atom>Questions>Q 2
On the basis of Rutherford's model of an atom which sub-atomic particle is present in the nucleus of an atom?
MEDIUM
9th CBSE
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS IX>Chapter 4 - Structure of the Atom>Questions>Q 3
Draw a sketch of Bohr's model of an atom with three shells.
HARD
9th CBSE
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS IX>Chapter 4 - Structure of the Atom>Questions>Q 4
What do you think would be the observation if the α-particle scattering experiment is carried out using a foil of a metal other than gold?
MEDIUM
9th CBSE
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS IX>Chapter 4 - Structure of the Atom>Questions>Q 2
Write the electronic configuration of any one pair of isotopes and isobars.
EASY
9th CBSE
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS IX>Chapter 4 - Structure of the Atom>Exercises>Q 16
Isotopes of an element have: