Structure Of Atom

Chemistry
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A proton is identical to:

A
The nucleus of helium
B
The nucleus of a hydrogen atom
C
A molecule of a hydrogen
D
An atom of hydrogen
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Which of the following quantities can only be a whole number?

A
Atomic radius
B
Atomic number
C
Mass number
D
Equivalent weight
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According to Bohr hypothesis, discrete quantity is

A
Momentum
B
Angular velocity
C
Potential energy
D
Angular momentum
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Bohr Magneton value in S.I. Units is:

A
B
C
D
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Substances having same number of electrons but different mass is known as:

A
isotopes
B
isobars
C
isotones
D
allotropes
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Bohrs atomic model assumes :

A
the nucleus is of infinite mass and is at rest
B
electron in a quantized orbit will not radiate energy
C
mass of the electron remains constant
D
all of the above
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The first model of an atom was given by _____________.

A
N. Bohr
B
E. Goldstein
C
Rutherford
D
J.J. Thomson
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Electron has nearly the equal mass as that of a/an:

A
proton
B
neutron
C
positron
D
-particle
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