Question # 1

How many electons can be accommodated in S subshell?

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2

6

14

10

Mass Number is repreented by

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Z

S

A

M

What information was obtained fom discharge tube expriments?

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Electrons and protons were discovered

Structur eof atom was discovered

Neutrons and protons were discovered

Presence of nucleus in an atom was discovered

The nucleus of an atom is composed of

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Electrons

Electons and protons

Protons and neutrons

Electrons and neutrons

How many electrons can be accommodated at the most in the third shell of the elements.

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8

10

18

32

Number of neurtons in ²⁷M₁₃are

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13

14

27

15

Rutherford used a gold foil in his experiment, which had a tickness of

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0,0002 cm

0,0001 cm

0.001 cm

0.00004cm

Whcih Isotopes is used for diagonosis of goiter?

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Iodine-131

Cobalt -60

P-32

Sr-90

A sub sheel that cna accommodate 6 electrons is

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b

s

f

p

An element has 5 electrons in M shell. Its tomic number is.

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5

10

15

20

How doe electrons keep themselves away from the oppositely charged nucleus.

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A agnetic field around the nucleus keeps them away

By keeping themselves stationary

By revolving around the nucleus

Due to their wave like nature

The removal of electron from a neutral atom gives rise to.

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Molecular anion

Anion

Cation

Molecular Cation

Quantum means.

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Virable energy

Fixed energy

High energy

Minimum energy

M shell has sub sheels.

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1s , 2s

1s,2s,3s

2s,2p

3s,3p,3d

Number of isotopes of hydrogen is

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2

5

4

3

Why has isotopes not been shown int he periodic table.

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Isotopes do not show periodic behavior

Periodic tble cannot accomodate a large number of isotopes of different elements

All the isotops have same atomic number so there is no need to give them separate places

Someof the isotopes are unstble and they give rise to different elements.

Proton are feflected toward plate.

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Positive

Negative

Both a and b

None of these

According to Rutherford's atomic theory, atom should produce.

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Line spectrum

Continuous spectrum

Both a and b

None of these

Atomic number is represented by

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P

A

At

Z

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