Question 1

One star has a temperature of 30,000 K and another star has a temperature of 6,000 K. Compared to the cooler star, how much more energy per second will the hotter star radiate from each square meter of its surface?

Accepted Answer

A)   5 times
B)   25 times
C)   8.1 × 1017 times
D)   625 times
E)   1.3 × 1015 times

Question 2

The H δ  line has a wavelength of 410.2 nm when observed in the laboratory. If the H δ  line appears in a stars spectrum at 410.0 nm, what is the radial velocity of the star?

Accepted Answer

A)   146 km/s away from the observer
B)   146 km/s toward the observer
C)   6.0 × 107 m/s away from the observer
D)   6.0 × 107 m/s toward the observer
E)   The radial velocity of the star cannot be determined from this information.

Question 3

A hotter star is brighter than a cooler star of the same size. Assume both are typical stars.

Accepted Answer

A) True 
 B)False

Question 4

A(n)  ____ contains two or more atoms that are bound together by exchanging or sharing electrons with each other.

Accepted Answer

A)   nucleus
B)   ion
C)   proton
D)   electron cloud
E)   molecule

Question 5

The most massive part of the atom is(are)  the ____ which has(have)  a ____ charge.

Accepted Answer

A)   electrons; negative
B)   nucleus; negative
C)   electrons; positive
D)   nucleus; positive

Question 6

An atom gained an electron. Therefore it is now called an ion.

Accepted Answer

A) True 
 B)False

Question 7

The neutral hydrogen atom consists of

Accepted Answer

A)   one proton and one neutron.
B)   one proton.
C)   one proton, one neutron, and one electron.
D)   one proton and one electron.
E)   an isotope and an ion.

Question 8

The neutral carbon atom consists of

Accepted Answer

A)   one proton and one neutron.
B)   six protons.
C)   one proton, one neutron, and one electron.
D)   six protons and six electrons.
E)   an isotope and an ion.

Question 9

When the electrons in an atom are in their lowest possible energy levels, the atom is said to be in its ____________________ state.

Accepted Answer

The answer of When the electrons in an atom are...

Question 10

The H γ  line has a wavelength of 434.0 nm when observed in the laboratory. If the H γ  line appears in a stars spectrum at 434.5 nm, what is the radial velocity of the star?

Accepted Answer

A)   346 km/s away from the observer
B)   346 km/s toward the observer
C)   1.3 × 108 m/s away from the observer
D)   1.3 × 108 m/s toward the observer
E)   The radial velocity of the star cannot be determined from this information.

Question 11

The Lyman series lines of hydrogen all lie in the infrared.

Accepted Answer

A) True 
 B)False

Question 12

Electrons in an atom are attracted to the nucleus by the _______________ force.

Accepted Answer

The answer of Electrons in an atom are attracted to...

Question 13

Which series is shown above?

Accepted Answer

A)   Lyman
B)   Paschen
C)   Balmer
D)   None of the other choices are correct.

Question 14

Isotopes of the same element have the same number of protons.

Accepted Answer

A) True 
 B)False

Question 15

In the above model of an atom, where is the neutron located, assuming a neutron is present?

Accepted Answer

A)   A
B)   1
C)   2
D)   3

Question 16

Which of the following is not a fundamental component of the atom?

Accepted Answer

A)   proton
B)   neutron
C)   ion
D)   electron

Question 17

Since an electron is so less massive than a proton, what is the approximate mass and charge of a neutral hydrogen atom?

Accepted Answer

A)   the mass of an electron, negative
B)   the mass of a proton, neutral
C)   the mass of a neutron, positive
D)   the mass of a proton and neutron, positive

Question 18

Diagram 6-1 
In Diagram 6-1, which of the transitions would absorb a photon with the smallest energy?

Accepted Answer

A)   Transition 1
B)   Transition 2
C)   Transition 3
D)   Transition 4
E)   Transition 5

Question 19

A zero Kelvin temperature is also known as ________________________.

Accepted Answer

The answer of A zero Kelvin temperature is also known...

Question 20

To create the above spectra, which of the following is NOT true?

Accepted Answer

A)   A dense gas is excited and the light produced is over all wavelengths.
B)   A low-density gas is excited and the light produced is over discrete wavelengths.
C)   Light from a low-density gas passes through a warm, dense gas and the light that is produced is at all wavelengths except for a few discrete wavelengths.
D)   All of the other choices are not true.

Exam 6: Atoms and Spectra

The H γ line has a wavelength of 434.0 nm when observed in the laboratory. If the H γ line appears in a stars spectrum at 434.5 nm, what is the radial velocity of the star?

Correct AnswerverifiedShow Answer

Diagram 6-1 In Diagram 6-1, which of the transitions would absorb a photon with the smallest energy?

Correct AnswerverifiedShow Answer

In the above model of an atom, where is the neutron located, assuming a neutron is present?

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The neutral carbon atom consists of

Correct AnswerverifiedShow Answer

A zero Kelvin temperature is also known as ________________________.

Correct AnswerverifiedShow Answer

One star has a temperature of 30,000 K and another star has a temperature of 6,000 K. Compared to the cooler star, how much more energy per second will the hotter star radiate from each square meter of its surface?

Correct AnswerverifiedShow Answer

Electrons in an atom are attracted to the nucleus by the _______________ force.

Correct AnswerverifiedShow Answer

A hotter star is brighter than a cooler star of the same size. Assume both are typical stars.

Correct AnswerverifiedShow Answer

An atom gained an electron. Therefore it is now called an ion.

Correct AnswerverifiedShow Answer

Which of the following is not a fundamental component of the atom?

Correct AnswerverifiedShow Answer

Isotopes of the same element have the same number of protons.

Correct AnswerverifiedShow Answer

Which series is shown above?

Correct AnswerverifiedShow Answer

The neutral hydrogen atom consists of

Correct AnswerverifiedShow Answer

Since an electron is so less massive than a proton, what is the approximate mass and charge of a neutral hydrogen atom?

Correct AnswerverifiedShow Answer

The H δ line has a wavelength of 410.2 nm when observed in the laboratory. If the H δ line appears in a stars spectrum at 410.0 nm, what is the radial velocity of the star?

Correct AnswerverifiedShow Answer

The Lyman series lines of hydrogen all lie in the infrared.

Correct AnswerverifiedShow Answer

A(n) ____ contains two or more atoms that are bound together by exchanging or sharing electrons with each other.

Correct AnswerverifiedShow Answer

When the electrons in an atom are in their lowest possible energy levels, the atom is said to be in its ____________________ state.

Correct AnswerverifiedShow Answer

To create the above spectra, which of the following is NOT true?

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The most massive part of the atom is(are) the ____ which has(have) a ____ charge.

Correct AnswerverifiedShow Answer

The H_γ line has a wavelength of 434.0 nm when observed in the laboratory. If the H_γ line appears in a stars spectrum at 434.5 nm, what is the radial velocity of the star?

Correct Answer
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The H_δ line has a wavelength of 410.2 nm when observed in the laboratory. If the H_δ line appears in a stars spectrum at 410.0 nm, what is the radial velocity of the star?

Correct Answer
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The most massive part of the atom is(are) the which has(have) a charge.

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