Question 1

Which of the following correctly ranks green, red, and blue visible light in order of increasing energy per photon?

Accepted Answer

Red \u003c Green \u003c Blue

Question 2

According to the equation $$E = \frac{hc}{\lambda}$$, what happens to the energy of a photon as its wavelength increases?

Accepted Answer

The energy decreases.

Question 3

A metal surface is irradiated with three different wavelengths of light: 325 nm, 455 nm, and 640 nm. Only the 325 nm light produces photoelectrons with the highest kinetic energy. Which observation best matches the 325 nm light?

Accepted Answer

Photoelectrons with kinetic energy of 155 kJ/m are observed.

Question 4

Which equation correctly expresses the kinetic energy of an electron ejected from a metal surface by a photon in the photoelectric effect?

Accepted Answer

$$KE = hv - \phi$$

Question 5

If a metal surface is struck with violet light instead of yellow light, what will happen to the kinetic energy of the ejected electrons?

Accepted Answer

The electrons will have greater kinetic energy than those ejected by yellow light.

Question 6

Which of the following best describes the emission spectrum of hydrogen?

Accepted Answer

It consists of four distinct lines in the visible region.

Question 7

What is meant by the term 'quantized' in the context of Bohr's model of the atom?

Accepted Answer

The atom can have only specific, discrete amounts of energy.

Question 8

Which of the following statements about atomic emission spectra is correct?

Accepted Answer

Each element has a unique line spectrum that can be used for identification.

Question 9

According to Bohr's model, what happens when an electron in a hydrogen atom 'jumps' from a higher energy orbit to a lower energy orbit?

Accepted Answer

A photon of light is emitted with energy equal to the difference between the two orbits.

Question 10

Which of the following real-world applications relies on the unique emission spectra of elements?

Accepted Answer

Identifying elements in fireworks displays.

Question 11

A scientist shines light of wavelength 455 nm on a metal surface and observes photoelectrons with kinetic energy of 51 kJ/m. If the scientist switches to 325 nm light, what will happen to the kinetic energy of the ejected electrons?

Accepted Answer

The kinetic energy will increase.

Question 12

Which of the following best explains why X-rays have more energy per photon than visible light?

Accepted Answer

X-rays have a much higher frequency than visible light.

Question 13

In the photoelectric effect, what is the minimum energy required to eject an electron from a metal surface called?

Accepted Answer

The binding energy ($$\phi)$$

Question 14

Which of the following is NOT explained by the Rutherford nuclear model of the atom, but IS explained by the Bohr model?

Accepted Answer

The existence of discrete energy levels in atoms.

Question 15

A neon sign emits light when an electric current excites neon atoms. What causes the characteristic color of the neon sign?

Accepted Answer

Electrons in neon atoms fall from higher to lower energy levels, emitting photons of specific energies.

Question 16

Which of the following statements about the relationship between wavelength, frequency, and energy of light is correct?

Accepted Answer

As wavelength increases, frequency and energy decrease.

Question 17

A forensic scientist analyzes a sample by passing its emitted light through a prism and observes a unique pattern of lines. What conclusion can the scientist draw?

Accepted Answer

The sample contains specific elements that can be identified by their emission spectra.

Question 18

Which of the following best describes a 'stationary state' in Bohr's model of the atom?

Accepted Answer

An electron orbit with a fixed distance from the nucleus and a specific energy.

Question 19

Which of the following is a real-world example of the photoelectric effect?

Accepted Answer

Solar panels generating electricity from sunlight.

Atomic Structure, Light Quantization, and the Photoelectric Effect

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