Quantum Review

When the frequency of a wave increases, what happens to the wavelength?

• The wavelength stays the same.

• The wavelength increases.

• The wavelength decreases.

• The wavelength is not related to the frequency.

Tags

NGSS.HS-PS4-1

Which of the following has the shortest wavelength and, therefore, the highest energy? (a)  

• Radio waves
• Ultraviolet Rays
• Gamma Rays
• X-rays

Tags

NGSS.HS-PS4-1

Line emission spectra is produced from atoms when

• electrons release energy as they move to their excited state.

• electrons absorb energy as they move to their excited state.

• electrons release energy as they return to the ground state.

• electrons absorb energy as they return to the ground state.

Tags

NGSS.HS-PS4-3

NGSS.HS-PS4-1

NGSS.HS-PS1-2

An infrared light wave has an energy of 3 x 10^-19 J. What is the frequency of this light wave?

• 2.21 x 10^-15 Hz

• 1.99 x 10^-52 Hz

• 4.52 x 10¹⁴ Hz

• 1 x 10²⁷ Hz

Tags

NGSS.HS-PS4-1

The color of visible light with lowest energy is

• violet

• green

• red

• indigo

Tags

NGSS.HS-PS4-4

When an electron moves from n=2 (energy level 2) to n=4 (energy level 4)

MULTIPLE ANSWERS: CHECK ALL CORRECT ANSWERS

• it must absorb light

• it will release light

• it will move farther from the nucleus

• it will move closer to the nucleus

Tags

NGSS.HS-PS4-3

In the modern Schroedinger model of the atom, what is meant by the term orbital?

• a 3-d region where there is the highest probability of finding an electron

• a circular pathway along which an electron will travel

• the amount of energy required to move an electron to it's "excited" state

• a random cloud of negative charge

Which two characteristics are variables in Heisenberg's uncertainty principle?

• wavelength and distance
• position and momentum
• charge and displacement
• atomic radius and frequency

How many quantum numbers are needed to describe the energy state of an electron in an atom?

• 1
• 2
• 3
• 4

______________ is spreading of wave when it passes through a small opening. Choose the correct answer

• Wave

• Spectrum

• Diffraction

• Prism