Question # 1

The concept of orbit was used by:

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J.J Thomson

Rutherford

Bohr

Planck

Which one of the following shell consists of three subshells?

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K- shell

M-Shell

L-shell

M-shell

Atoms of elements combine chemically to form:

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Mixtures

compounds

solutions

ions

Which one of the following is the most penetrating?

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protons

electrons

neutrons

alpha paticles

For diagnosis of goiter in thyroid gland we use

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Co-60

C-14

I-131

Sr-90

The number of electrons in K shell of O is ________________

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9

10

2

1

When U-235 breaks up, it produces?

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electrons

neutrons

protons

nothing

First energy level is denoted by:

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K

L

M

N

In 9th century scientist accepted by:

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Dalton

Bohars

Rutherford

Nil

L shell can accommodate ________________ electrons.

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2

8

18

32

The no.of neutrons in deutrium is

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1

2

3

4

___________ is used in treatment of cancer.

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Cobalt-60

C-12

H-3

Nil

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