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Chemistry - 9 Chapter - 3
Atomic Structure
Test - 10
1.
Summerfield, a German, Physicist proved that the orbits are ________.
a) elliptical
b) elliptical and circular both.
c) circular
2.
The atomic model proposed by J.J Thomson in 1904 was named as "Plum Pudding Model.
a) False
b) True
3.
High energy atoms, on cooling _______.
a) Absorb Energy
b) Break UP
c) Emit radiations
d) Emit energy
4.
The spectrum of the emitted radiation is called?
a) Energy spectrum
b) Atomic spectrum
c) Radiated spectrum
5.
Shells have different energy levels (orbits around the nucleus.
a) True
b) False
6.
Atom as a whole is a neutral particle.
a) True
b) False
7.
The number of electrons and protons in an atom is different?
a) False
b) True
8.
Atomic number is also called?
a) Proton number
b) Neutron number
c) Atomic number
9.
The protons and neutrons together are called nucleons.
a) True
b) False
10.
Total number of protons and neutrons is called.
a) 1. Mass number
b) 3. Nucleus number
c) Answer 1 & 3 are correct
d) 2. Nucleon Number
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