EASY
9th CBSE
IMPORTANT
Earn 100

Mass of an electron is  ×10-28 gram. (9.11/ 1.60/ 1.67)

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Important Questions on Structure of Atom

EASY
9th CBSE
IMPORTANT
The Science Springboard: A Foundation Course Based on NCERT Curriculum>Chapter 9 - Structure of Atom>Check Your Progress
The whole mass of the atom is concentrated in the _____.
EASY
9th CBSE
IMPORTANT
The Science Springboard: A Foundation Course Based on NCERT Curriculum>Chapter 9 - Structure of Atom>Check Your Progress
The atomic number of an element is 12, the number of protons are _____ and electrons are _____ in the atom.
EASY
9th CBSE
IMPORTANT
The Science Springboard: A Foundation Course Based on NCERT Curriculum>Chapter 9 - Structure of Atom>Check Your Progress
Isotopes have the same atomic number but different _____ number.
EASY
9th CBSE
IMPORTANT
The Science Springboard: A Foundation Course Based on NCERT Curriculum>Chapter 9 - Structure of Atom>Check Your Progress
Isobars are atoms having the same mass number but different _____ number.
EASY
9th CBSE
IMPORTANT
The Science Springboard: A Foundation Course Based on NCERT Curriculum>Chapter 9 - Structure of Atom>Check Your Progress
Atomic number = number of _____.
EASY
9th CBSE
IMPORTANT
The Science Springboard: A Foundation Course Based on NCERT Curriculum>Chapter 9 - Structure of Atom>Practice Questions
On the basis of Rutherford's model of an atom, which subatomic particle is present in the nucleus of an atom?
EASY
9th CBSE
IMPORTANT
The Science Springboard: A Foundation Course Based on NCERT Curriculum>Chapter 9 - Structure of Atom>Practice Questions
What should be the pressure inside the discharge tube of the order of 0.001?
EASY
9th CBSE
IMPORTANT
The Science Springboard: A Foundation Course Based on NCERT Curriculum>Chapter 9 - Structure of Atom>Practice Questions
Why Bohr's orbits are called stationary states?