Unit 7k Reassessment

How does an electron become excited?

• It releases energy

• It drops to a lower principal energy level

• it absorbs energy

• it moves closer to the nucleus

Radio waves, visible light, and x rays are examples of electromagnetic waves that always differ from each other in

• amplitude

• intensity

• temperature

• wavelength

Which of the following has the electromagnetic waves going from least amount of energy to most amount of energy?

• Radio Waves, Infrared, X Rays

• Gamma, Infrared, Microwaves

• Microwaves, Radio, X Rays

• Visible Light, Infrared, Microwaves

Tags

NGSS.HS-PS4-3

NGSS.HS-PS4-4

Which color has the longest wavelength?

• Red

• Orange

• Yellow

• Blue

Which color photon would have the lowest frequency

• red

• green

• blue

• yellow

True or false: Based on the lewis structure for the unknown element X (pictured above), X has at least ten electrons.

• True

• False

Based on the bright line spectrum pictured above, which element is NOT contained in the mixture?

• Element A

• Element D

• Element Z

• All elements are contained in the mixture

• 7
• 8
• 9
• 10

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

How many valence electrons does Hydrogen Have?

• 1 Valence electron

• 2 Valence electron

• 3 Valence electron

• 4 Valence electron

• 5 Valence electron

Tags

NGSS.HS-PS1-1

How many valence electrons does Aluminum Have?

• 1 Valence electron

• 2 Valence electron

• 3 Valence electron

• 4 Valence electron

• 5 Valence electron

Tags

NGSS.HS-PS1-1