Question # 1

Deuterium is used to make:

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light water

heavy water

soft water

hard water

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

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

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Absorb

Radiate

Nothing

Nil

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

First energy level is denoted by:

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K

L

M

N

"Atoms" means _________

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Divisible

Indivisible

Break

Nil

Which of the following can accommodate 18 electrons?

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K

L

M

N

Which one of the following shell consists of three subshells?

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K- shell

M-Shell

L-shell

M-shell

The number of isotopes of carbon are

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1

2

3

5

Hydrogen has ________________ isotopes.

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1

2

3

4

Neuron was discovered by

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Sir Willium Crooks

Goldstein

James Chadwik

Neil Bohr

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