Question 1

Dispersing light from a gas-discharge tube produces what type of spectrum?

Accepted Answer

A)  Ultraviolet 
B)  Line absorption 
C)  Continuous 
D)  Line emission 
A)  Ultraviolet 
B)  Line absorption 
C)  Continuous 
D)  Line emission D

Question 2

Calculate the radius in nanometers of the orbit of a hydrogen atom's electron with n = 5.

Accepted Answer

A)  0.27 
B)  2.7 
C)  1.3 
D)  0.13 
A)  0.27 
B)  2.7 
C)  1.3 
D)  0.13 C

Question 3

The nuclear model of the atom is associated with

Accepted Answer

A)  Thomson. 
B)  Dalton. 
C)  Bohr. 
D)  Rutherford. 
A)  Thomson. 
B)  Dalton. 
C)  Bohr. 
D)  Rutherford. D

Question 4

When a hydrogen electron is in its first excited state,its principal quantum number is

Accepted Answer

A)  zero. 
B)  2. 
C)  -13.60 eV. 
D)  1. 
A)  zero. 
B)  2. 
C)  -13.60 eV. 
D)  1.

Question 5

The "X" in X-ray stands for ______________.

Accepted Answer

The answer of The "X" in X-ray stands for ______________....

Question 6

Another name for quantum mechanics is ______________ mechanics.

Accepted Answer

The answer of Another name for quantum mechanics is ______________...

Question 7

Which of these colors of light has photons of lowest energy?

Accepted Answer

A)  Yellow 
B)  Green 
C)  Blue 
D)  Violet 
A)  Yellow 
B)  Green 
C)  Blue 
D)  Violet

Question 8

Which of these instruments is based on the theory of matter waves?

Accepted Answer

A)  Microwave oven 
B)  X-ray tube 
C)  Electron microscope 
D)  Cathode ray tube 
A)  Microwave oven 
B)  X-ray tube 
C)  Electron microscope 
D)  Cathode ray tube

Question 9

A beam of laser light is

Accepted Answer

A)  neither monochromatic nor coherent. 
B)  monochromatic but not coherent. 
C)  coherent but not monochromatic. 
D)  both monochromatic and coherent. 
A)  neither monochromatic nor coherent. 
B)  monochromatic but not coherent. 
C)  coherent but not monochromatic. 
D)  both monochromatic and coherent.

Question 10

Calculate the frequency,in hertz,of photons of light with energy of 2.00 × 10-19 J.

Accepted Answer

0.302 * 10

Question 11

Niels Bohr focused his attention on the element hydrogen because it

Accepted Answer

A)  could be obtained in extremely high purity. 
B)  was so abundant. 
C)  had the simplest atom. 
D)  was inexpensive. 
A)  could be obtained in extremely high purity. 
B)  was so abundant. 
C)  had the simplest atom. 
D)  was inexpensive.

Question 12

Which of these colors of light has photons of greatest energy?

Accepted Answer

A)  Violet 
B)  Red 
C)  Blue 
D)  Yellow 
A)  Violet 
B)  Red 
C)  Blue 
D)  Yellow

Question 13

The element named ______________ was detected spectroscopically on the Sun before it was found on Earth.

Accepted Answer

The answer of The element named ______________ was detected spectroscopically...

Question 14

Matter waves were confirmed when it was found that electrons

Accepted Answer

A)  diffract. 
B)  have a plus or minus spin quantum number. 
C)  possess a negative charge. 
D)  have mass. 
A)  diffract. 
B)  have a plus or minus spin quantum number. 
C)  possess a negative charge. 
D)  have mass.

Question 15

A useful instrument that makes use of the wavelike properties of electrons is the electron ______________.

Accepted Answer

The answer of A useful instrument that makes use of...

Question 16

The number of electrons in an atom of an element is the same as the element's

Accepted Answer

A)  atomic number. 
B)  period number. 
C)  mass number. 
D)  group number. 
A)  atomic number. 
B)  period number. 
C)  mass number. 
D)  group number.

Question 17

Optical scanners at the grocery store often use He-Ne ______________.

Accepted Answer

The answer of Optical scanners at the grocery store often...

Question 18

The n = 2 energy level is known as the (two words)______________ ______________ state.

Accepted Answer

The answer of The n = 2 energy level is...

Question 19

The transitions of an electron in the hydrogen atom to the n = 1 level result in the

Accepted Answer

A)  Lyman series. 
B)  Balmer series. 
C)  Paschen series. 
D)  Bohr series. 
A)  Lyman series. 
B)  Balmer series. 
C)  Paschen series. 
D)  Bohr series.

Question 20

If the energy of n = 6 is -0.378 eV and that of n = 4 is -0.850 eV in a hydrogen atom,a transition from n = 6 to n = 4 will emit a photon of what energy?

Accepted Answer

0.472 eV (

Exam 9: Atomic Physics

Dispersing light from a gas-discharge tube produces what type of spectrum?

Calculate the radius in nanometers of the orbit of a hydrogen atom's electron with n = 5.

The nuclear model of the atom is associated with

When a hydrogen electron is in its first excited state,its principal quantum number is

The "X" in X-ray stands for ______________.

Another name for quantum mechanics is ______________ mechanics.

Which of these colors of light has photons of lowest energy?

Which of these instruments is based on the theory of matter waves?

A beam of laser light is

Calculate the frequency,in hertz,of photons of light with energy of 2.00 × 10-19 J.

Niels Bohr focused his attention on the element hydrogen because it

Which of these colors of light has photons of greatest energy?

The element named ______________ was detected spectroscopically on the Sun before it was found on Earth.

Matter waves were confirmed when it was found that electrons

A useful instrument that makes use of the wavelike properties of electrons is the electron ______________.

The number of electrons in an atom of an element is the same as the element's

Optical scanners at the grocery store often use He-Ne ______________.

The n = 2 energy level is known as the (two words)______________ ______________ state.

The transitions of an electron in the hydrogen atom to the n = 1 level result in the

If the energy of n = 6 is -0.378 eV and that of n = 4 is -0.850 eV in a hydrogen atom,a transition from n = 6 to n = 4 will emit a photon of what energy?

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Calculate the frequency,in hertz,of photons of light with energy of 2.00 × 10^-19 J.

The n = 2 energy level is known as the (two words) state.