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

A
The electron absorbs energy as it moves to a higher energy level.
B
The electron releases energy as it moves to a higher energy level.
C
The electron releases energy as it moves to a lower energy level.
D
The electron absorbs energy as it moves to a lower energy level.
2
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What type of spectrum is shown? Expand Image

A
emission
B
infrared light
C
absorption
D
electromagnetic
3

An absorption spectrum of oxygen is shown. Expand Image What is most likely the emission spectrum of oxygen?

A
Image with description A rainbow for a line spectra. There are 5 lines in purple, 6 lines in blue, 1 line in blue-green, 4 lines in the green, 3 lines in the yellow, 4 lines in the orange and 4 lines in red.
B
Image with description A rainbow for a line spectra. There are 4 lines in purple, 4 lines in blue, 3 lines in blue-green, 6 lines in the yellow, 4 lines in the orange and 15 lines in red.
C
Image with description A rainbow for a line spectra. There are 4 lines in purple, 4 lines in blue, 3 lines in blue-green, 7 lines in the green, 6 lines in the yellow, 5 lines in the orange and 10 lines in red.
D
Image with description A rainbow for a line spectra. There are 4 lines in purple, 4 lines in blue, 2 lines in blue-green, 4 lines in the green, 2 lines in the yellow, 3 lines in the orange and 4 lines in red.
4

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

A
Table with 3 columns and 4 rows.Row 1: Column 1, 'Particle'; Column 2, 'Charge'; Column 3, 'Location' Row 2: Column 1, 'Proton'; Column 2, 'negative'; Column 3, 'inside nucleus' Row 3: Column 1, 'Electron'; Column 2, '0'; Column 3, 'outside nucleus' Row 4: Column 1, 'Neutron'; Column 2, 'negative'; Column 3, 'inside nucleus'
B
Table with 3 columns and 4 rows.Row 1: Column 1, 'Particle'; Column 2, 'Charge'; Column 3, 'Location' Row 2: Column 1, 'Proton'; Column 2, '0'; Column 3, 'outside nucleus' Row 3: Column 1, 'Electron'; Column 2, 'negative'; Column 3, 'inside nucleus' Row 4: Column 1, 'Neutron'; Column 2, 'plus'; Column 3, 'inside nucleus'
C
Table with 3 columns and 4 rows.Row 1: Column 1, 'Particle'; Column 2, 'Charge'; Column 3, 'Location' Row 2: Column 1, 'Proton'; Column 2, 'plus'; Column 3, 'inside nucleus' Row 3: Column 1, 'Electron'; Column 2, 'negative'; Column 3, 'outside nucleus' Row 4: Column 1, 'Neutron'; Column 2, '0'; Column 3, 'inside nucleus'
D
Table with 3 columns and 4 rows.Row 1: Column 1, 'Particle'; Column 2, 'Charge'; Column 3, 'Location' Row 2: Column 1, 'Proton'; Column 2, 'plus'; Column 3, 'outside nucleus' Row 3: Column 1, 'Electron'; Column 2, '0'; Column 3, 'outside nucleus' Row 4: Column 1, 'Neutron'; Column 2, 'negative'; Column 3, 'inside nucleus'
5

What is released when an excited electron returns to a lower energy state?

A
electricity
B
a proton
C
electromagnetic radiation
D
an isotope
6

The emission spectrum of the element lithium is shown. Expand Image What is the best estimate of the color that will be seen when a sample of lithium gas absorbs a lot of energy?

A
mix of yellow and green
B
mix of red and orange
C
pure yellow
D
mix of blue and green
7

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

A
electrons.
B
protons.
C
neutrinos.
D
neutrons.
8

Which excited electron has the lowest energy?

A
Image with description A green dot in the middle of 5 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. The fourth away from the green dot is labeled n = 4 and the last is labeled n = 5. There is an orange dot on the n = 5 circle.
B
Image with description A green dot in the middle of 5 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. The fourth away from the green dot is labeled n = 4 and the last is labeled n = 5. There is an orange dot on the n = 2 circle.
C
Image with description A green dot in the middle of 5 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. The fourth away from the green dot is labeled n = 4 and the last is labeled n = 5. There is an orange dot on the n = 4 circle.
D
Image with description A green dot in the middle of 5 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. The fourth away from the green dot is labeled n = 4 and the last is labeled n = 5. There is an orange dot on the n = 3 circle.
9

What causes the appearance of lines in an emission spectrum?

A
Light is absorbed as an electron moves to a higher energy state.
B
Light is released as an electron moves to a lower energy state.
C
An electron is released as light when it moves to a lower energy state.
D
An electron is released as light when it moves to a higher energy state.
10

Which statement is part of Bohr's atomic model?

A
Electrons orbit the nucleus in narrow ellipses, like how the planets orbit the Sun.
B
Electrons with the highest energy are found with orbits of the smallest radius.
C
Electrons absorb or emit light when they change energy levels.
D
Electrons exist as waves and clouds of probability with specific orbits and shapes.

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