Question # 1

What is difference is isotopes

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Number of protons

Number of neutrons

Number of electrons

Charge number

The number of Isotopes of cesium are.

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4

32

22

36

Various types of cancer are treated by

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Carbon -14

Nickel -63

Cobalt -60

Strontium -90

I amu =

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9.31 MeV

931 MeV

9.031 MeV

None of above

Which of the following basic force is able to provide an attraction between two neutrons:

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Electrostatic and nuclear b

Electrostatic and gravitational

Gravitational and strong nuclear

Only nuclear force

Half life of radon gas is

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3.8 minutes

3.8 days

3.8 months

3.8 years

Hydrogen bomb is an example of.

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Nuclear fission

Nuclear fusion

Chain reaction

Chemical reaction

Those elements whose charge number z is greater then __________ are unstable:

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80

79

82

83

The quantity of U in the naturally occurring uranium is.

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0.2%

0.3%

0.7%

0.4%

In nuclear radiation , track of alpha particle is.

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Thin

Discontinuous

Erratic

Continuous

Two up quarks and one down quarks makes a

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Proton

Newton

Photon

Meson

Nuclear fission was discovered by:

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Otto Hahn

Friz strassmann

Both a and b

Michaelson

The most useful tracer is.

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Strontium -90

Iodine -31

Cobalt -60

Carbon -14

Which of the following is typical source of alpha particle.

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Strontium -94

Radon -222

Cobalt -60

Zic sulphate

The energy equivalent of 1 kg of matter is about:

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10^-15 J

1 J

10^-12J

10^-17J

The first atomic reactor was introduced by

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Currie

Enrico Fermi

Newton

Bohr

amu =

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1.06 x 10^-27 kg

1.6606 x 10^-27 kg

1.520 x 10^-21 kg

1.6606 x 10^-31 kg

Which of the following is similar to electron.

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Beta particle

Alpha particle

Neutron

Proton

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