MEDIUM
9th CBSE
IMPORTANT
Earn 100

What is the relation between the atomic number and mass number of an element?

Important Questions on Structure of Atom

MEDIUM
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 4 - Structure of Atom>Long Answer Type Questions>Q 59
If an element M has mass number 24 and atomic number 12, how many neutrons does its atom contain? 36/12
EASY
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 4 - Structure of Atom>Multiple Choice Questions (MCQs)>Q 60
Rutherford's alpha particle scattering experiment led to the discovery of:
EASY
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 4 - Structure of Atom>Multiple Choice Questions (MCQs)>Q 61
Which of the following is the correct electronic configuration of sodium? 
EASY
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 4 - Structure of Atom>Multiple Choice Questions (MCQs)>Q 62
The particle not present in an ordinary hydrogen atom is :
EASY
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 4 - Structure of Atom>Multiple Choice Questions (MCQs)>Q 63
The subatomic particle called electron was discovered by :
MEDIUM
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 4 - Structure of Atom>Multiple Choice Questions (MCQs)>Q 64
Which of the following represents the correct electron distribution in magnesium ion?
MEDIUM
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 4 - Structure of Atom>Multiple Choice Questions (MCQs)>Q 65
The correct electronic configuration of a chloride ion is :
EASY
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 4 - Structure of Atom>Multiple Choice Questions (MCQs)>Q 66
Goldstein's experiments which involved passing high voltage electricity through gases at very low pressure resulted in the discovery of :