EASY
9th CBSE
IMPORTANT
Earn 100

A nitrogen atom contains 7 protons, 7 electrons and 7 neutrons. Why is it that the atomic mass of nitrogen is 14 and not 21?

Important Questions on Structure of the Atom

EASY
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 4 - Structure of the Atom>Practice Questions>Q 15
Name the fundamental particles discovered by Goldstein.
EASY
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 4 - Structure of the Atom>Practice Questions>Q 15
Name the fundamental particles discovered by Thomson.
EASY
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 4 - Structure of the Atom>Practice Questions>Q 15
Name the fundamental particles discovered by Chadwick.
EASY
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 4 - Structure of the Atom>Practice Questions>Q 16

Write yes or no.

Are protons present in all types of atoms? 

MEDIUM
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 4 - Structure of the Atom>Practice Questions>Q 17
Are relative atomic masses of elements whole numbers? (Yes/ No)
EASY
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 4 - Structure of the Atom>Practice Questions>Q 18

Define valency.

EASY
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 4 - Structure of the Atom>Practice Questions>Q 19
Define the term isotope with a suitable example.
EASY
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 4 - Structure of the Atom>Practice Questions>Q 20
Give a reason for different atomic masses of the isotopes of an element.