Question # 1

"Atoms" means _________

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Divisible

Indivisible

Break

Nil

________________ proposed that matter is composed of small particles.

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Greek

English's

Russian

Nil

The number of electrons in K shell of O is ________________

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9

10

2

1

Half life of C-14 ________________ years.

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5800

5700

5600

5500

Alpha particles are double charged.

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Negative

Positive

Can be both

Nil

The boiling point of H2O is:

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100

12

1.105

9

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

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2

8

18

32

In 9th century scientist accepted by:

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Dalton

Bohars

Rutherford

Nil

Cathode rays are actually

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Electrons

Protons

Neutrons

Photons

Neuron was discovered by

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Sir Willium Crooks

Goldstein

James Chadwik

Neil Bohr

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

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Absorb

Radiate

Nothing

Nil

In isotopes numbers of ________________ is same.

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Protons

Electrons

Neutrons

Mass number

Who discovered the proton?

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Goldstein

J.J Thomson

Neil Bohr

Ruther Ford

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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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