Question 1

The most intense lines in the Lyman and Balmer series emitted from the hydrogen atom are in what part of the electromagnetic spectrum?
A) ultraviolet
B) visible
C) infrared
D) radio

Accepted Answer

The Lyman series is in the ultraviolet region, while the Balmer series is in the visible region. However, the most intense lines from both series are in the ultraviolet part of the spectrum.

Question 2

The sequence of ultraviolet emission lines emitted by hot hydrogen gas is known as the _____ series.
A) Paschen
B) Planck
C) Lyman
D) Balmer

Accepted Answer

The Lyman series refers to the sequence of ultraviolet emission lines emitted by hydrogen gas when an electron transitions from higher energy levels (n > 1) to the first energy level (n = 1).

Question 3

The specific sequence of spectral line series emitted by excited hydrogen atoms, in order of decreasing energy of the lowest energy transition, is
A) Balmer, Lyman, Paschen.
B) Lyman, Paschen, Balmer.
C) Lyman, Balmer, Paschen.
D) Paschen, Balmer, Lyman.

Accepted Answer

The Lyman series has the highest energy transitions (ultraviolet), followed by the Balmer series (visible light), and then the Paschen series (infrared), reflecting the decreasing energy of the photons emitted.

Question 4

In the hydrogen atom, light is emitted whenever an electron
A) jumps from a lower to an upper energy level or orbit.
B) reverses its direction of motion in its orbit.
C) jumps from an upper to a lower energy level or orbit.
D) spirals into the nucleus.

Accepted Answer

Light is emitted in a hydrogen atom when an electron transitions from an upper (higher energy) level to a lower (lower energy) level, releasing energy in the form of a photon.

Question 5

Hydrogen gas is heated to the point at which there are electrons at atomic energy levels up to the n = 3 level. When electrons return to the ground state, what possible emission lines from which spectral sequences will result? See Figure 4-11. 
A) Paschen (IR), Balmer (visible), and Lyman (UV) series
B) Lyman (UV) series only
C) Balmer (visible) series only
D) Balmer (visible) and Lyman (UV) series

Accepted Answer

The answer of Hydrogen gas is heated to the point...

Question 6

When electrons jump from higher levels in hydrogen atoms to the level n = 2, the resulting spectrum will consist of a
A) continuum of light with a maximum in the visible spectral range.
B) series of UV lines, the Lyman series.
C) series of IR spectral lines, the Paschen series.
D) series of spectral lines, some of which are in the visible range, the Balmer series.

Accepted Answer

When electrons transition to the n=2 energy level in hydrogen atoms, they emit photons that correspond to the Balmer series, which includes spectral lines in the visible range.

Question 7

The mass of the electrically neutral particle, the neutron, which is one component of the atomic nucleus along with the proton, is _____ the mass of the proton.
A) about twice
B) about the same as
C) 2000 times less than
D) 200 times greater than

Accepted Answer

The mass of a neutron is about the same as the mass of a proton. Both particles have masses close to 1 atomic mass unit, making them nearly equal in mass.

Question 8

If a continuous spectrum of ultraviolet radiation passes through a tube of cool hydrogen gas, what happens to its spectrum? A) All the radiation passes unhindered except the Lyman L _$\alpha$ wavelength, which is absorbed by the atoms. B) Some of the radiation at all wavelengths is absorbed, reducing the intensity at all wavelengths uniformly. C) All the radiation passes through the tube unhindered because the hydrogen gas is cool and cannot absorb energy. D) All the radiation passes through the tube unhindered except at the specific wavelengths of the Lyman series, L _$\alpha$ , L _$\beta$ _,and so on, which are absorbed by the atoms.

Accepted Answer

Hydrogen atoms absorb ultraviolet radiation at specific wavelengths corresponding to the energy differences between the ground state and higher energy levels. These specific wavelengths are known as the Lyman series. When ultraviolet radiation passes through cool hydrogen gas, only the photons with energies matching the transitions of the Lyman series are absorbed, leading to dark lines in the spectrum at those wavelengths.

Question 9

Where does the Paschen series of spectral lines from hydrogen gas appear in the electromagnetic spectrum?
A) radio range, with wavelengths longer than 0.01 m or 10 mm
B) ultraviolet region, with wavelengths between 90 nm and 130 nm
C) infrared, with wavelengths longer than 700 nm
D) visible region, with wavelengths between 350 nm to 660 nm

Accepted Answer

The Paschen series of spectral lines from hydrogen gas appears in the infrared region of the electromagnetic spectrum, with wavelengths longer than 700 nm. This series corresponds to electronic transitions from higher energy levels to the n=3 level.

Question 10

The strong red spectral line emitted by hot hydrogen gas is known as the _____ line.
A) 21-cm
B) Balmer $\alpha$
C) Lyman $\alpha$
D) Paschen $\alpha$

Accepted Answer

The strong red spectral line emitted by hot hydrogen gas is part of the Balmer series, specifically known as the H-alpha (Hα) line. This series is visible in the optical part of the electromagnetic spectrum.

Question 11

Electrons in atoms
A) occupy levels whose energies are fixed.
B) can have any energy.
C) cannot interact with light.
D) can only absorb light.

Accepted Answer

Electrons in atoms occupy discrete energy levels, meaning they can only exist in specific energy states, not just any energy level. This is a fundamental principle of quantum mechanics.

Question 12

Consider a set of electrons undergoing transitions between energy levels. In the resulting bright line spectrum, the line with the shortest wavelength is produced by the transitions between which of these states?
A) highest to middle
B) highest to lowest
C) lowest to highest
D) middle to lowest

Accepted Answer

The shortest wavelength corresponds to the highest energy transition. Since energy is inversely proportional to wavelength, the transition from the highest to the lowest energy level releases the most energy, resulting in the shortest wavelength.

Question 13

Atoms of hot hydrogen gas will emit the Balmer series of spectral lines at visible wavelengths when the electrons fall from all higher atomic energy levels to the
A) ionization level, or n = infinity.
B) next level down for each level .
C) first excited level, n = 2.
D) ground state, n = 1.

Accepted Answer

The Balmer series of spectral lines is emitted when electrons in hydrogen atoms fall from higher energy levels to the second energy level (n = 2), known as the first excited level. This series is visible in the optical part of the electromagnetic spectrum.

Question 14

Emission spectra from interstellar gas clouds glow with a variety of colors. Red usually indicates hydrogen, and green is usually a characteristic of
A) helium.
B) oxygen.
C) carbon.
D) uranium.

Accepted Answer

Green emission in interstellar gas clouds is typically characteristic of oxygen, especially when ionized, producing distinct green lines in the emission spectrum.

Question 15

The Balmer series of visible spectral emissions from hydrogen gas arises from transitions in which electrons jump between energy levels
A) from all levels to the ground state, n = 1.
B) from higher levels to the second excited level, n = 3.
C) between adjacent levels (e.g., n = 2 to n = 1, n = 3 to n = 2, n = 4 to n = 3, etc.).
D) from higher levels to the first excited level, n = 2.

Accepted Answer

The Balmer series involves electron transitions from higher energy levels (n ≥ 3) to the second energy level (n = 2), resulting in the emission of visible light.

Question 16

The neutron is the electrically neutral particle that, along with the proton, makes up the atomic nucleus. The mass of the neutron, compared with that of the proton, is
A) 1/2000 as large.
B) 2000 times greater.
C) about 1/10 as large.
D) about the same.

Accepted Answer

The mass of the neutron is very close to that of the proton, making both particles almost equal in mass. This similarity in mass is crucial for the stability of atomic nuclei.

Question 17

The series of spectral absorption lines in the infrared part of the spectrum, known as the Paschen series, results from atomic transitions in hydrogen atoms in which electrons are lifted from which energy level to all higher atomic energy levels?
A) n = 1 level, the ground state, because all series start here
B) n = 3 level
C) ionization level
D) n = 2 level

Accepted Answer

The Paschen series involves transitions from the n = 3 energy level to higher energy levels (n > 3) in hydrogen atoms. This series lies in the infrared part of the electromagnetic spectrum.

Question 18

The Lyman series of ultraviolet spectral emission lines from hydrogen gas is produced by electrons jumping
A) to the first excited level from all higher levels.
B) to the ground state from all other energy levels.
C) between adjacent energy levels, n = 2 to n = 1, n = 3 to n = 2, n = 4 to n = 3, and so on.
D) from the continuum level to all other levels.

Accepted Answer

The Lyman series is produced when electrons fall to the ground state (n=1) from higher energy levels (n>1). This results in the emission of ultraviolet light.

Question 19

Light that originates in hydrogen atoms in which electrons have jumped from high levels to the level n = 2 will be part of which series of spectral lines?
A) Lyman
B) Balmer
C) There would be a continuum of light, not a series of lines.
D) Paschen

Accepted Answer

The Balmer series of the hydrogen spectrum corresponds to transitions of electrons from higher energy levels (n > 2) down to the n = 2 level.

Question 20

In a simple atom, the electrons making transitions between the outermost energy levels and the innermost energy levels give rise to photons with the
A) reddest colors.
B) highest speeds.
C) longest wavelengths.
D) highest energies.

Accepted Answer

Electrons transitioning from outermost to innermost energy levels release photons with high energy, corresponding to shorter wavelengths and higher frequencies.

Quiz 4: Atomic Physics and Spectra

The most intense lines in the Lyman and Balmer series emitted from the hydrogen atom are in what part of the electromagnetic spectrum?

The sequence of ultraviolet emission lines emitted by hot hydrogen gas is known as the _____ series.

The specific sequence of spectral line series emitted by excited hydrogen atoms, in order of decreasing energy of the lowest energy transition, is

In the hydrogen atom, light is emitted whenever an electron

Hydrogen gas is heated to the point at which there are electrons at atomic energy levels up to the n = 3 level. When electrons return to the ground state, what possible emission lines from which spectral sequences will result? See Figure 4-11.

When electrons jump from higher levels in hydrogen atoms to the level n = 2, the resulting spectrum will consist of a

The mass of the electrically neutral particle, the neutron, which is one component of the atomic nucleus along with the proton, is _____ the mass of the proton.

If a continuous spectrum of ultraviolet radiation passes through a tube of cool hydrogen gas, what happens to its spectrum?

Where does the Paschen series of spectral lines from hydrogen gas appear in the electromagnetic spectrum?

The strong red spectral line emitted by hot hydrogen gas is known as the _____ line.

Electrons in atoms

Consider a set of electrons undergoing transitions between energy levels. In the resulting bright line spectrum, the line with the shortest wavelength is produced by the transitions between which of these states?

Atoms of hot hydrogen gas will emit the Balmer series of spectral lines at visible wavelengths when the electrons fall from all higher atomic energy levels to the

Emission spectra from interstellar gas clouds glow with a variety of colors. Red usually indicates hydrogen, and green is usually a characteristic of

The Balmer series of visible spectral emissions from hydrogen gas arises from transitions in which electrons jump between energy levels

The neutron is the electrically neutral particle that, along with the proton, makes up the atomic nucleus. The mass of the neutron, compared with that of the proton, is

The series of spectral absorption lines in the infrared part of the spectrum, known as the Paschen series, results from atomic transitions in hydrogen atoms in which electrons are lifted from which energy level to all higher atomic energy levels?

The Lyman series of ultraviolet spectral emission lines from hydrogen gas is produced by electrons jumping

Light that originates in hydrogen atoms in which electrons have jumped from high levels to the level n = 2 will be part of which series of spectral lines?

In a simple atom, the electrons making transitions between the outermost energy levels and the innermost energy levels give rise to photons with the