W7D3 Wed: TEST 4

Front

What happens to an electron when energy is added?

Back

It gets excited and moves up an energy level.

Front

What is released when an electron loses energy?

Back

a photon

Front

Calculate the energy (E) of a photon with frequency 4.3 x 10¹⁹ Hz using E=h⋅f, where h ≈ 6.626×10⁻³⁴ J⋅s.

Back

E ≈ 2.85 × 10⁻¹⁴ J

Front

If the frequency of a red spectrum line is at 1.60 x 10¹⁴ Hz, how much energy (E) does each photon of this light have? (HINT: use the formula E = hf)
h = 6.626 x 10^-34

Back

Each photon of this red light has an energy of approximately 1.06 × 10⁻¹⁹ joules.

Front

Find the wavelength (λ) of electromagnetic radiation with a frequency of 8.6 x 10¹¹ Hz. C = f x λ

Back

λ ≈ 3.488 × 10⁻⁸ m

Front

Photon X has a frequency that is twice the frequency of Photon Z. Which photon (X or Z) has the highest energy?

Back

X

Front

Photon X has a frequency that is twice the frequency of Photon Z. Which photon (X or Z) has the longest wavelength?

Back

Z

Front

Which travels at a greater frequency, ultraviolet light or infrared light?

Back

ultraviolet

Front

What happens when an electron emits light?

Back

The electron "calms down" and "drops back down" closer to the nucleus.

Front

What happens when an electron absorbs a photon?

Back

The electron moves to a higher energy level.