Question # 1

________________ proposed that matter is composed of small particles.

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Greek

English's

Russian

Nil

Which of the following result in discovery of proton?

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cathode rays

canal rays

x-rays

alpha rays

The no.of neutrons in deutrium is

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1

2

3

4

Energy of a shell is ________________

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Variable

Constant

Cannot be changed

Nil

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

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2

8

18

32

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

"Atoms" means _________

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Divisible

Indivisible

Break

Nil

The number of electrons in K shell of O is ________________

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9

10

2

1

Canal rays are actually

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Electrons

Protons

Neutrons

X-rays

Which of the following can accommodate 18 electrons?

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K

L

M

N

Atoms of elements combine chemically to form:

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Mixtures

compounds

solutions

ions

When U-235 breaks up, it produces?

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electrons

neutrons

protons

nothing

Cathode rays are actually

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Electrons

Protons

Neutrons

Photons

The isotopes of an element have different number of

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Electrons

Protons

Neutrons

Protons & Neutrons

The p subshell has:

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one orbital

two orbitals

three orbitals

four orbitals

L shell can accommodate ________________ electrons.

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2

8

18

32

According to Bohr, electrons can revolve only in this orbits whose angular momentum is

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h/2π

n 2h/π

n h2/2π

n h/2π

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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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