Question 1

When the energy state of an atom changes by ΔE, the frequency of the photon emitted or absorbed is calculated by dividing ΔE by ______________.

Accepted Answer

h, or Plan

Question 2

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

Accepted Answer

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

Question 3

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

Question 4

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 5

Niels Bohr reasoned that a discrete line spectrum must be the result of a(n) ______________ effect.

Accepted Answer

The answer of Niels Bohr reasoned that a discrete line...

Question 6

The principle that states that the exact position and the velocity of an object can never be known simultaneously is called ______________ principle.

Accepted Answer

Heisenberg

Question 7

The number of electrons in a hydrogen atom is ______________.

Accepted Answer

The answer of The number of electrons in a hydrogen...

Question 8

According to the Bohr theory, the probability of finding a hydrogen atom's ground-state electron 0.053 nm from the proton is

Accepted Answer

A)  low, but not zero. 
B)  100%. 
C)  zero. 
D)  high, but not 100%. 
A)  low, but not zero. 
B)  100%. 
C)  zero. 
D)  high, but not 100%.

Question 9

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

Accepted Answer

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

Question 10

Calculate the de Broglie wavelength for an electron (m = 1 × 10-30 kg) moving at 2.4 × 106 m/s.

Accepted Answer

2.8 * 10<s

Question 11

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

Accepted Answer

0.302 * 10¹⁵

Question 12

The "billiard ball model" of the atom is associated with a scientist named ______________.

Accepted Answer

The answer of The "billiard ball model" of the atom...

Question 13

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 14

The "particle" of light given off by an excited electron when it loses energy is called a(n) ______________.

Accepted Answer

The answer of The "particle" of light given off by...

Question 15

Who discovered the electron in 1897?

Accepted Answer

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

Question 16

Calculate the frequency in hertz of photons of light with energy of 8.10 × 10-19 J.

Accepted Answer

A)  0.82 × 1014 Hz 
B)  0.82 × 1015 Hz 
C)  1.22 × 1015 Hz 
D)  1.22 × 1014 Hz 
A)  0.82 × 1014 Hz 
B)  0.82 × 1015 Hz 
C)  1.22 × 1015 Hz 
D)  1.22 × 1014 Hz

Question 17

According to the hypothesis of de Broglie, any moving particle has

Accepted Answer

A)  energy. 
B)  a magnetic force field. 
C)  an electric force field. 
D)  a wavelength. 
A)  energy. 
B)  a magnetic force field. 
C)  an electric force field. 
D)  a wavelength.

Question 18

The ancient Greek who is known for championing the concept of the atom was named ______________.

Accepted Answer

Democritus

Question 19

As the speed of an object decreases, its wavelength

Accepted Answer

A)  remains unchanged. 
B)  decreases. 
C)  increases. 
D)  is zero. 
A)  remains unchanged. 
B)  decreases. 
C)  increases. 
D)  is zero.

Question 20

When a hydrogen atom's electron goes from an energy state of n = 1 to n = 3,

Accepted Answer

A)  the radius of the electron's orbit is unchanged. 
B)  the radius of the electron's orbit is increased. 
C)  the radius of the electron's orbit is decreased. 
D)  the radius of the electron's orbit is infinite. 
A)  the radius of the electron's orbit is unchanged. 
B)  the radius of the electron's orbit is increased. 
C)  the radius of the electron's orbit is decreased. 
D)  the radius of the electron's orbit is infinite.

Exam 9: Atomic Physics

When the energy state of an atom changes by ΔE, the frequency of the photon emitted or absorbed is calculated by dividing ΔE by ______________.

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

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

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

Niels Bohr reasoned that a discrete line spectrum must be the result of a(n) ______________ effect.

The principle that states that the exact position and the velocity of an object can never be known simultaneously is called ______________ principle.

The number of electrons in a hydrogen atom is ______________.

According to the Bohr theory, the probability of finding a hydrogen atom's ground-state electron 0.053 nm from the proton is

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

Calculate the de Broglie wavelength for an electron (m = 1 × 10-30 kg) moving at 2.4 × 106 m/s.

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

The "billiard ball model" of the atom is associated with a scientist named ______________.

A beam of laser light is

The "particle" of light given off by an excited electron when it loses energy is called a(n) ______________.

Who discovered the electron in 1897?

Calculate the frequency in hertz of photons of light with energy of 8.10 × 10-19 J.

According to the hypothesis of de Broglie, any moving particle has

The ancient Greek who is known for championing the concept of the atom was named ______________.

As the speed of an object decreases, its wavelength

When a hydrogen atom's electron goes from an energy state of n = 1 to n = 3,

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Calculate the de Broglie wavelength for an electron (m = 1 × 10^-30 kg) moving at 2.4 × 10⁶ m/s.

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

Calculate the frequency in hertz of photons of light with energy of 8.10 × 10^-19 J.