Define valency. 

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 1

Name the scientist who coined the term electron.

EASY

9th CBSE

IMPORTANT

LIVING SCIENCE CHEMISTRY 9>Chapter 4 - Structure of the Atom>CHECK YOUR PROGRESS>Q 2

Name the scientist who proved the existence of electron.

EASY

9th CBSE

IMPORTANT

LIVING SCIENCE CHEMISTRY 9>Chapter 4 - Structure of the Atom>CHECK YOUR PROGRESS>Q 3

What is a discharge tube?

EASY

9th CBSE

IMPORTANT

LIVING SCIENCE CHEMISTRY 9>Chapter 4 - Structure of the Atom>CHECK YOUR PROGRESS>Q 4

Give the name of the scientist who first prepared electrical discharge tube to show that gases conduct electricity.

EASY

9th CBSE

IMPORTANT

LIVING SCIENCE CHEMISTRY 9>Chapter 4 - Structure of the Atom>CHECK YOUR PROGRESS>Q 5

What are cathode rays?

MEDIUM

9th CBSE

IMPORTANT

LIVING SCIENCE CHEMISTRY 9>Chapter 4 - Structure of the Atom>CHECK YOUR PROGRESS>Q 6

Define electron. State its relative mass and charge.

EASY

9th CBSE

IMPORTANT

LIVING SCIENCE CHEMISTRY 9>Chapter 4 - Structure of the Atom>CHECK YOUR PROGRESS>Q 7

What is the nature of cathode rays?

EASY

9th CBSE

IMPORTANT

LIVING SCIENCE CHEMISTRY 9>Chapter 4 - Structure of the Atom>CHECK YOUR PROGRESS>Q 8

What are cathode rays made of?