EASY
9th CBSE
IMPORTANT
Earn 100

The part of an atom where most of the mass is concentrated is called .

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Important Questions on Structure of the Atom

MEDIUM
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 4 - Structure of the Atom>EXERCISES>Q C
The nucleus of an atom is nearly 1n times the size in comparison to the total size of the atom. The value of n is _____. (100000/1000000)
EASY
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 4 - Structure of the Atom>EXERCISES>Q C
The total number of protons and neutrons in the nucleus of an atom is called _____.
EASY
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 4 - Structure of the Atom>EXERCISES>Q C

An atom has atomic number 11 and mass number 23. The atom has _____ electrons.

EASY
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 4 - Structure of the Atom>EXERCISES>Q C
The neutron has _____ charge. (negative/ zero/ positive)
EASY
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 4 - Structure of the Atom>EXERCISES>Q C
The valency of an element with atomic number 10 is _____ (zero/ two/ one).
EASY
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 4 - Structure of the Atom>EXERCISES>Q C

The scientist who discovered nucleus is _____.

EASY
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 4 - Structure of the Atom>EXERCISES>Q C

The scientist who discovered neutron is _____.

MEDIUM
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 4 - Structure of the Atom>EXERCISES>Q C
The atoms of different elements which have the same mass number are called _____.