Question # 1

___________ is used in treatment of cancer.

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Cobalt-60

C-12

H-3

Nil

Which of the following can accommodate 18 electrons?

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K

L

M

N

Energy of a shell is ________________

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Variable

Constant

Cannot be changed

Nil

Hydrogen has ________________ isotopes.

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1

2

3

4

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

"Atoms" means _________

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Divisible

Indivisible

Break

Nil

In 9th century scientist accepted by:

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Dalton

Bohars

Rutherford

Nil

Canal rays are actually

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Electrons

Protons

Neutrons

X-rays

For diagnosis of goiter in thyroid gland we use

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Co-60

C-14

I-131

Sr-90

________________ proposed that matter is composed of small particles.

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Greek

English's

Russian

Nil

Neuron was discovered by

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Sir Willium Crooks

Goldstein

James Chadwik

Neil Bohr

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9th Class Chemistry Chapter 2 Structure of Atoms English Medium KPK Boards Online Mcqs MCQs With Answers

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