Question # 1

Energy of a shell is ________________

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Variable

Constant

Cannot be changed

Nil

Which of the following can accommodate 18 electrons?

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K

L

M

N

Canal rays are actually

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Electrons

Protons

Neutrons

X-rays

Who discovered the proton?

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Goldstein

J.J Thomson

Neil Bohr

Ruther Ford

Cathode rays are actually

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Electrons

Protons

Neutrons

Photons

___________ is used in treatment of cancer.

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Cobalt-60

C-12

H-3

Nil

Which one of the following shell consists of three subshells?

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K- shell

M-Shell

L-shell

M-shell

For diagnosis of goiter in thyroid gland we use

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Co-60

C-14

I-131

Sr-90

Which one of the following is the most penetrating?

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protons

electrons

neutrons

alpha paticles

The p subshell has:

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one orbital

two orbitals

three orbitals

four orbitals

In 9th century scientist accepted by:

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Dalton

Bohars

Rutherford

Nil

The isotopes C-12 is present in abundance of:

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96.6%

97.6%

99.7%

None of these

Hydrogen has ________________ isotopes.

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1

2

3

4

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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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