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# College Quantum Physics and the Atom Questions

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College Quantum Physics and the Atom
Which range of wavelength is involved in the visible spectrum?
1. $10^-12 m$
2. $4 xx 10^-7 "m to 7" xx 10^-7 m$
3. $10^-2 m$
4. $10^4 m$
College Quantum Physics and the Atom
Which of the following describes electron spin quantum number?
1. An orbital holds two electrons, and they have identical spin
2. An orbital holds three electrons, and they have identical spins
3. An orbital holds two electrons, and they have opposite spins
4. An orbital holds three electrons, and they have opposite spins
College Quantum Physics and the Atom
Which of the following correctly describes the changes in frequency and energy, in moving from radio waves to gamma rays?
1. Energy and frequency both decrease
2. Energy and frequency both increase
3. Energy increases, and frequency decreases
4. Energy decreases, and frequency increases
College Quantum Physics and the Atom
College Quantum Physics and the Atom
How is energy transferred?
1. in packets of energy called protons
2. in the form of subatomic particles
3. in the form of photons and subatomic particles
4. in the form of photons
College Quantum Physics and the Atom
Which of the following represents stability in bonds on a plot of potential energy vs. distance?
1. The highest amount of energy
2. The greatest amount of repulsion
3. The lowest amount of energy
4. Both (b) and (c)
College Quantum Physics and the Atom
Which of the following equations represents energy that can be used in problems involving specific energy transitions?
1. E=$(-2.178 xx 10^-18 J)(Z^2/n^2)$
2. ∆E=$h/{mv}$
3. $∆E=nhv$
4. ∆E=hf
College Quantum Physics and the Atom
To which of the following elements does the Bohr model apply to?
1. helium, only
2. hydrogen and helium
3. hydrogen, only
4. hydrogen, helium, and lithium
College Quantum Physics and the Atom
Which of the following equations represents the energy lost or gained?
1. $∆E=∆mc^2$
2. $∆E=∆(mc)^2$
3. $∆E=nhv$
4. $∆E={nh}/v$
College Quantum Physics and the Atom
Which of the following correctly describes the Bohr Model?
1. The electron exists in triangular regions called orbitals
2. Electrons are distributed randomly throughout an atom
3. Electrons are distributed in a dense region known as an orbital
4. Electrons are distributed in a circular region known as orbits
College Quantum Physics and the Atom
Calculate ∆E when the following transition occurs in a hydrogen atom: $n=4 rarr n=2$.
1. $-1.36 xx 10^-19 J$
2. $-4.084 xx 10^-19 J$
3. $-5.45 xx 10^-19 J$
4. $4.084 xx 10^-19 J$
College Quantum Physics and the Atom
Which of the following can be inferred from the results of photoelectronic spectroscopy?
1. It allows the structure of protons to be observed
2. It allows the electronic structure of atoms to be determined
3. It allows the structure of neutrons to be observed
4. None of the above
College Quantum Physics and the Atom
Assuming that two species have the same electron arrangement, which of the following will lead to a higher ionization energy for an electron?
1. A higher nuclear charge
2. A lower nuclear charge
3. A lower nuclear charge and greater electron-electron repulsion
4. None of the above
College Quantum Physics and the Atom
Which of the following correctly represents the relationship between distance and first ionization energy?
1. As distance increases, so too does the ionization energy
2. As distance increases, the ionization energy decreases
3. As distance decreases, the ionization energy remains the same
4. As distance increases, the ionization energy remains the same
College Quantum Physics and the Atom
Which of the following is represented by the discrete lines in bright-line spectra?
1. definite speeds of light
2. definite frequencies
3. definite wavelengths
4. none of the above
College Quantum Physics and the Atom
In going from gamma rays to microwaves, how do wavelength and energy change?
1. Wavelength and energy both increase
2. Wavelength and energy both decrease
3. Wavelength decreases, while energy increases
4. Wavelength increases, while energy decreases
College Quantum Physics and the Atom
Which of the following equations correctly relates the different factors considered on the electromagnetic spectrum?
1. $E=hclambda$
2. $E={hv}/{lambda}$
3. $E={hv}/{c}$
4. $E={hc}/{lambda}$
College Quantum Physics and the Atom
What is one difference between photoelectronic spectroscopy and measurements of first ionization energy?
1. Photoelectronic spectroscopy only measures the first ionization energy using electrons removed from the outermost shell
2. There is no distinction between them
3. Photoelectronic spectroscopy can be measured using an electron removed from any energy level
4. The kinetic energy of all electrons are measured in photoelectronic spectroscopy
College Quantum Physics and the Atom
Which equation correctly describes the electric force between two charged objects?
1. $F=k_e{q_1 q_2}/{r^2}$
2. $F=k_e{q_1 q_2}/{r}$
3. $F=k_eq_1 q_2r^2$
4. None of the above
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