EASY
9th CBSE
IMPORTANT
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The number of protons in the nucleus of an atom is called its . [atomic number / mass number]

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Important Questions on Structure of Atom
EASY
9th CBSE
IMPORTANT
The total number of protons and neutrons in the nucleus of an atom is called its _____.

EASY
9th CBSE
IMPORTANT
An atom has an atomic mass number and atomic number . The atom has _____ electrons.

EASY
9th CBSE
IMPORTANT
An atom of an element has protons, electrons and neutrons. The atomic mass number of the atom is _____.

EASY
9th CBSE
IMPORTANT
If the nucleus of an atom has an atomic number, mass number and there areelectrons outside the nucleus, the number of neutrons in it is _____.

EASY
9th CBSE
IMPORTANT
Almost all the mass of an atom is concentrated in a small region of space called the _____.

EASY
9th CBSE
IMPORTANT
Cathode rays are a beam of fast-moving _____. (protons/ electrons)

EASY
9th CBSE
IMPORTANT
The anode rays obtained from hydrogen gas consist of particles called _____.

EASY
9th CBSE
IMPORTANT
The maximum number of electrons that can be accommodated in the L shell is_____.
