Question 1

Which region of the electromagnetic spectrum has the shortest wavelength and the highest energy?

Accepted Answer

Gamma rays

Question 2

According to the electromagnetic spectrum, which type of radiation has a longer wavelength than visible light but a lower frequency?

Accepted Answer

Infrared

Question 3

A hospital uses X-rays for imaging. Based on the electromagnetic spectrum, what can you infer about the energy and wavelength of X-rays compared to visible light?

Accepted Answer

X-rays have higher energy and shorter wavelength than visible light.

Question 4

Which equation correctly relates the speed of light $$(c)$$, wavelength $$(\lambda)$$, and frequency $$(
u) of $$electromagnetic radiation?

Accepted Answer

$$c = \lambda 
u$$

Question 5

A green laser pointer emits light at a wavelength of $$532\ 	ext{nm}. $$Which region of the electromagnetic spectrum does this correspond to?

Accepted Answer

Visible

Question 6

According to the Bohr model, which transition in a hydrogen atom emits the highest energy photon?

Accepted Answer

From $$n=5 to$$ $$n=2$$

Question 7

Which color of visible light corresponds to the longest wavelength in the hydrogen emission spectrum?

Accepted Answer

Red

Question 8

If an electron in a hydrogen atom transitions from $$n=4 to$$ $$n=2$$, what is the color of the photon emitted?

Accepted Answer

Blue-green

Question 9

Which of the following best explains why ultraviolet light is more dangerous to humans than visible light?

Accepted Answer

Ultraviolet light has a shorter wavelength and higher energy.

Question 10

A student observes three lines in the hydrogen emission spectrum at $$434\ 	ext{nm}$$, $$486\ 	ext{nm}$$, and $$656\ 	ext{nm}. $$Which transition produces the $$434\ 	ext{nm}$$ line?

Accepted Answer

From $$n=5 to$$ $$n=2$$

Question 11

Which of the following correctly ranks the following types of electromagnetic radiation in order of increasing frequency: infrared, ultraviolet, gamma rays?

Accepted Answer

Infrared \u003c Ultraviolet \u003c Gamma rays

Question 12

Which formula would you use to calculate the energy $$(E) of a $$photon given its frequency $$(
u)$$?

Accepted Answer

$$E = h
u$$

Question 13

A remote control uses infrared light to communicate with a television. Compared to visible light, infrared light has:

Accepted Answer

Longer wavelength and lower energy

Question 14

Which transition in the Bohr model would absorb a photon of the greatest energy?

Accepted Answer

From $$n=2 to$$ $$n=5$$

Question 15

A forensic scientist uses ultraviolet light to detect substances at a crime scene. Which property of ultraviolet light makes it suitable for this application?

Accepted Answer

It can cause certain materials to fluoresce.

Question 16

Which of the following statements about the Bohr model is correct?

Accepted Answer

Electrons occupy specific energy levels and emit photons when transitioning to lower levels.

Question 17

A scientist wants to calculate the wavelength of light emitted when an electron falls from $$n=4 to$$ $$n=2 in a $$hydrogen atom. Which equation should they use?

Accepted Answer

$$\frac{1}{\lambda} = R_H \left( \frac{1}{n_1$^2} - \frac{1}{n_2$^2} \right)$$

Question 18

Which of the following best describes the relationship between wavelength and frequency for electromagnetic radiation?

Accepted Answer

As wavelength increases, frequency decreases.

Question 19

Which color of visible light has the highest energy photons?

Accepted Answer

Violet

Question 20

A student claims that microwaves have higher energy than ultraviolet light. Based on the electromagnetic spectrum, is this correct?

Accepted Answer

No, because microwaves have a longer wavelength and lower frequency.

The Electromagnetic Spectrum and the Bohr Model in General Chemistry

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