MEDIUM
9th CBSE
IMPORTANT
Earn 100

The deflection of cathode rays by electric and magnetic fields was known before Thomson carried out his work on cathode rays. What is the major contribution of Thomson?

Important Questions on Structure of the Atom

EASY
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 4 - Structure of the Atom>CHECK YOUR PROGRESS>Q 12
Name the scientist who measured the charge of electron for the first time. What type of experiment did he carry out for this?
EASY
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 4 - Structure of the Atom>CHECK YOUR PROGRESS>Q 13
Name the scientist who measured the e/m ratio of electron for the first time.(J J Thomson/Rutherford)
MEDIUM
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 4 - Structure of the Atom>CHECK YOUR PROGRESS>Q 14
How will you calculate the mass of an electron?
HARD
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 4 - Structure of the Atom>CHECK YOUR PROGRESS>Q 15
Calculate the mass of electron in atomic mass unit.
MEDIUM
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 4 - Structure of the Atom>CHECK YOUR PROGRESS>Q 16
How many times an atom of hydrogen is heavier than an electron?
MEDIUM
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 4 - Structure of the Atom>CHECK YOUR PROGRESS>Q 17
State the evidences other than cathode rays for the existence of electron.
EASY
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 4 - Structure of the Atom>CHECK YOUR PROGRESS>Q 18
Are electrons present in all matter?
MEDIUM
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 4 - Structure of the Atom>CHECK YOUR PROGRESS>Q 19
Draw a labeled diagram showing the presence of cathode rays in a discharge tube.