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# Bohr Model (College)

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## Bohr Model

1.
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

2.
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
3.
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

4.
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
5.
What is the energy associated with an electron in the fifth energy level of a hydrogen atom?
1. $-2.178xx10^-18 J$
2. $-5.445 xx 10^-19 J$
3. $-2.42 xx 10^-19 J$
4. $-8.712 xx 10^-20 J$

6.
What is the value of energy associated with the second energy level of an atom?
1. $-5.445 xx 10^-19 J$
2. $-8.712 xx 10^-20 J$
3. $-2.42 xx 10^-19 J$
4. $-2.178 xx 10^-18 J$
7.
Calculate ∆E when the following transition occurs in a hydrogen atom: $n=2 rarr n=6$.
1. $-5.45 xx 10^-19 J$
2. $-6.05 xx 10^-20 J$
3. $4.84 xx 10^-19 J$
4. $-4.84 xx 10^-19 J$

8.
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. $4.084 xx 10^-19 J$
9.
Calculate ∆E when the following energy change occurs: n=1 to n=5.

10.
Electrons move in circular orbits, as stated by the Bohr Model.
1. True
2. False
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