Atomic Spectra

Question 1

A student has an unknown sample. How can spectroscopy be used to identify the sample?

Revolt · Accepted Answer

A: It can identify the elements in the sample.

Question 2

Which best explains what happens when an electron moves from an excited state to the ground state?

Revolt · Accepted Answer

D: The electron releases energy as it moves to a lower energy level.

Question 3

What is the main difference between the Schrödinger model and the Bohr atomic model?

Revolt · Accepted Answer

B: Bohr believed electron orbits were circular, but Schrödinger’s equations represent complex shapes describing the probable locations of electrons.

Question 4

A table of the visible light spectrum is shown below.Tyrone analyzes the emission spectrum of an unknown element. He observes two discrete lines at 600 nm and 650 nm, and he sees many lines corresponding to shorter wavelengths, with the strongest line being at 475 nm.Which emission spectrum is Tyrone most likely analyzing?

Revolt · Accepted Answer

C: A line spectrum with 3 black lines in purple, 2 black lines in blue, 2 black lines in light blue, one black line in green and one black line in yellow.

Question 5

The bright light emission spectrums below are seen through a spectroscope. The unknown sample is a mixture of the observed gases.Which gases are found in the unknown sample?

Revolt · Accepted Answer

D: gases Z and Y

Question 6

What causes the appearance of lines in an emission spectrum?

Revolt · Accepted Answer

B: Light is released as an electron moves to a lower energy state.

Question 7

Changes in the appearance of emission and absorption spectrums are caused by the activities of

Revolt · Accepted Answer

B: electrons.

Question 8

Four students made a graphic organizer describing the parts of the atom.Which table best describes the parts of the atom?

Revolt · Accepted Answer

D: A 3 column table with 3 rows. The first column is labeled particle with entries proton, electron, neutron. The second column is labeled charge with entries positive, negative, 0. The last column is labeled location with entries inside nucleus, outside nucleus, inside nucleus.

Question 9

The emission spectrum of iodine is shown below.Which is the absorption spectrum?

Revolt · Accepted Answer

C: A line spectra with 2 black lines in purple, 6 black lines in blue, 3 black lines in light blue, 1 black line in green-blue, 10 black lines in green, 8 black lines in yellow, 6 black lines in orange and 8 black lines in red.

Question 10

The table below shows the wavelengths of visible light that correspond to different colors.A student analyzes the emission spectrum of an unknown element and observes strong lines at the following wavelengths: 656 nm, 486 nm, 434 nm.Which absorption spectrum is the student most likely viewing?

Revolt · Accepted Answer

A: A line spectrum with one black line in purple, blue, light blue and red.

Atomic Spectra Answers

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