Atoms Test

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Atoms Test - 1

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Question 1
1 / -0

According to ‘plum pudding model’ atoms on the whole are electrically neutral because

A
the positive charge of the atom is uniformly distributed throughout the volume of the electron and the negative charge of electrons balances positive parts

B
positive charge is concentrated at one place and negative charge is elsewhere.

C
the negative charge of the atom is uniformly distributed throughout the volume of the atom and the positively charged electrons are embedded in it

D
the positive charge of the atom is uniformly distributed throughout the volume of the atom and the negatively charged electrons are embedded in it
Question 2
1 / -0

Each element is associated with

A
with a characteristic radiation of monochromatic light

B
no light radiation or absorption

C
with a characteristic absorption of monochromatic light

D
with a characteristic spectrum of radiation
Question 3
1 / -0

alpha particles used in Geiger-Marsden experiment were obtained from

A
accelerating H ions

B
electron accelerators

C
accelerating He ions

D
214/83 Bi Radioactive source
Question 4
1 / -0

In Geiger-Marsden experiment very small deflection of the beam was expected because

A
there are no electrical forces at work

B
positive charge and the negative electrons are distributed through the whole atom reducing electric field inside the atom

C
particles are collimated by lead screens

D
most particles pass through
Question 5
1 / -0

Which of these statements correctly describe the atomic model according to classical electromagnetic theory ?

A
The electrons would spiral inwards and fall into the nucleus

B
electrons do not radiate electromagnetic waves

C
the positive charge and negative electron cancel and no waves are radiated

D
The waves emitted by electrons are discrete
Question 6
1 / -0

In Geiger-Marsden experiment prediction was that

A
some particles would be expected at 75∘

B
some particles would be expected at 45∘

C
All the particles would bounce from the foil at 180∘

D
All the particles would go through the foil with hardly any deflection
Question 7
1 / -0

In Geiger-Marsden experiment, at the point of closest approach

A
the kinetic energy is not zero and the electrical potential is greater than the initial kinetic energy supplied

B
the kinetic energy is zero and the electrical potential equals the initial kinetic energy supplied

C
the kinetic energy is not zero and the electrical potential equals the initial kinetic energy supplied

D
the kinetic energy is not zero and the electrical potential is less than the initial kinetic energy supplied
Question 8
1 / -0

In Geiger-Marsden experiment, actual results was

A
Number of particles at angle ϕ was zero at ϕ =80∘

B
Number of particles at angle ϕ was zero at ϕ =70∘

C
Number of particles at angle ϕ was non zero at all angles including at 180∘

D
Number of particles at angle ϕ was zero at ϕ =180∘
Question 9
1 / -0

The model that best explains the results of Geiger-Marsden experiment is

A
Rutherford model

B
None of the above

C
Thomson model

D
Bohr model
Question 10
1 / -0

spectrum is

A
The splitting into the component colors or wavelengths of light when passed through a lens.

B
The splitting into the component colors of white light when passed through a prism or a diffraction grating

C
the splitting into the component colors or wavelengths of monochromatic light when passed through a prism or a diffraction grating

D
The splitting into the component colors or wavelengths of light when passed through a prism or a diffraction grating

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Atoms Test - 1

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Question 1

the positive charge of the atom is uniformly distributed throughout the volume of the electron and the negative charge of electrons balances positive parts

positive charge is concentrated at one place and negative charge is elsewhere.

the negative charge of the atom is uniformly distributed throughout the volume of the atom and the positively charged electrons are embedded in it

the positive charge of the atom is uniformly distributed throughout the volume of the atom and the negatively charged electrons are embedded in it

Question 2

with a characteristic radiation of monochromatic light

no light radiation or absorption

with a characteristic absorption of monochromatic light

with a characteristic spectrum of radiation

Question 3

accelerating H ions

electron accelerators

accelerating He ions

214/83 Bi Radioactive source

Question 4

there are no electrical forces at work

positive charge and the negative electrons are distributed through the whole atom reducing electric field inside the atom

particles are collimated by lead screens

most particles pass through

Question 5

The electrons would spiral inwards and fall into the nucleus

electrons do not radiate electromagnetic waves

the positive charge and negative electron cancel and no waves are radiated

The waves emitted by electrons are discrete

Question 6

some particles would be expected at 75∘

some particles would be expected at 45∘

All the particles would bounce from the foil at 180∘

All the particles would go through the foil with hardly any deflection

Question 7

the kinetic energy is not zero and the electrical potential is greater than the initial kinetic energy supplied

the kinetic energy is zero and the electrical potential equals the initial kinetic energy supplied

the kinetic energy is not zero and the electrical potential equals the initial kinetic energy supplied

the kinetic energy is not zero and the electrical potential is less than the initial kinetic energy supplied

Question 8

Number of particles at angle ϕ was zero at ϕ =80∘

Number of particles at angle ϕ was zero at ϕ =70∘

Number of particles at angle ϕ was non zero at all angles including at 180∘

Number of particles at angle ϕ was zero at ϕ =180∘

Question 9

Rutherford model

None of the above

Thomson model

Bohr model

Question 10

The splitting into the component colors or wavelengths of light when passed through a lens.

The splitting into the component colors of white light when passed through a prism or a diffraction grating

the splitting into the component colors or wavelengths of monochromatic light when passed through a prism or a diffraction grating

The splitting into the component colors or wavelengths of light when passed through a prism or a diffraction grating

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