Question # 1

A particle having the mass of electron and charge of a proton is called a

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photon

position

antiproton

antineutrino

β-particles are easily deflected by collisions than heavy

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α-particles

β-particles

γ-particles

none of these

Neutrons are

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positive charge

negatively charged

massless

neutral

The range of particle depends upon the factor

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charge, mass and energy of particle

density of medium

ionization potential of the atoms

all the above

A mass difference of 0.0012 u is equivalent to and energy of:

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0.5 Me V

1.13 MeV

5.13 MeV

1.13 keV

1.13 eV

A curie represents a very strong source of

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α-particle

β-particle

γ-particle

none of these

The half life of radioactive substances depends upon

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amount of substance

energy of substance

state of substance

temperature of substance

The missing mass which is converted to energy in the formation of nucleus, is called

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packing fraction

mass defect

binding energy

none of these

For an atom having atomic number Z and atomic weight A, the number of electron in an atoms

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A - Z

A + Z

Z

A

The nuclei of an element having the same charge number but different mass numbers are called:

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Isobars

Isotopes

Isomers

Isobaric

Isothermal

The counter, which also provides the power to the G.M. tube is called:

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Thin mica window

thin glass window

Airy window

Wooden window

None of these

A mass spectrograph sort out

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molecules

atoms

elements

isotopes

Radioactivity

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is exhibited more by semiconductors in general

in exhibited more by the element when they are coupled

with other radioactive elements by a covalent bond

is an atomic property of radioactive elements

When certain nucleus emits aβ-particles, is mass number:

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Remain same

Increases by one

Decreases by one

Decreases by four

None of these

γ-rays behave like a particle because they explain the

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Compton effect

Photoelectric effect

Pair-production

all the above

The chemical behaviour of an atom is determined by

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binding energy

atomic number

mass number

number of isotopes

For Protium, the mass defect is:

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Infinite

Zero

Very large

A few grams

None of these

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