Question # 1

________________ orbital is more complex in shape.

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s

p

f

d

Neuron was discovered by

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Sir Willium Crooks

Goldstein

James Chadwik

Neil Bohr

In isotopes numbers of ________________ is same.

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Protons

Electrons

Neutrons

Mass number

Which radioisotope is used for the diagnosis of tumor in the body?

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cobalt-60

iodine-131

strontium-90

phosphorus-30

The no.of neutrons in deutrium is

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1

2

3

4

Who discovered the proton?

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Goldstein

J.J Thomson

Neil Bohr

Ruther Ford

In ________________ Rutherford's was studying radiations.

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1911

1931

1921

1922

The maximum no.of electrons that can be accommodated in M shell are

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2

8

18

32

Which one of the following shell consists of three subshells?

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K- shell

M-Shell

L-shell

M-shell

When U-235 breaks up, it produces?

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electrons

neutrons

protons

nothing

Which one of the following is the most penetrating?

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protons

electrons

neutrons

alpha paticles

Deuterium is used to make:

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light water

heavy water

soft water

hard water

For diagnosis of goiter in thyroid gland we use

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Co-60

C-14

I-131

Sr-90

Electron ________________ energy when they jump from low to higher level.

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Absorb

Radiate

Nothing

Nil

Hydrogen has ________________ isotopes.

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1

2

3

4

The value of Planck's constant is

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6.63 x 10-34 Js

6.63 x 10-32 Js

6.63 x 10-30 Js

6.63 x 10-28 Js

The number of electrons in K shell of O is ________________

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9

10

2

1

"Atoms" means _________

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Divisible

Indivisible

Break

Nil

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