Unit Test

Question 1

What type of spectrum is shown below?

Revolt · Accepted Answer

A: absorption

Question 2

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 3

A green dot in the middle of 4 concentric circles. The first away from the green dot is labeled n = 1. The second circle away from the green dot is labeled n = 2. The third circle away from the green dot is labeled n = 3 and the last is labeled n = 4. There is an arrow from n = 4 to n = 1 labeled A. There is an arrow from n = 3 to n = 2 labeled B. There is an arrow from n = 3 to n = 1 labeled C. There is an arrow from n = 2 to n = 1 labeled D.

Revolt · Accepted Answer

A: A

Question 4

What are characteristics of absorption spectra? Select 3 options. Light is absorbed, which produces characteristic lines.Light is emitted, which produces characteristic lines.Lines are dark on a visible light background.Lines are brightly colored on a black background.Lines are produced by electrons being excited.Lines are produced from electrons returning to a lower energy level.

Revolt · Accepted Answer

A: Light is absorbed, which produces characteristic lines.; C: Lines are dark on a visible light background.; E: Lines are produced by electrons being excited.

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

Which statement is part of Bohr's atomic model?

Revolt · Accepted Answer

A: Electrons absorb or emit light when they change energy levels.

Question 7

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 8

This image shows a stream of positively charged particles being directed at gold foil. The positively charged particles are called "alpha particles” and each one is like a nucleus without any electrons.

Revolt · Accepted Answer

D: When the dense, positive alpha particle passes close to a positive nucleus of gold, the alpha particle repels and hits the screen at point X.

Question 9

J.J. Thompson is credited with discovering the

Revolt · Accepted Answer

B: electron.

Question 10

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.

Unit Test Answers

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