Emission

True or False: The ground state is the highest energy state of an atom.

• True

• False

For an electron to change from ground state to an excited stated it must...

• Absorb energy
• Release energy

Tags

NGSS.HS-PS1-2

What is the light that you can see called?

• observatory light

• ultraviolet light

• visible light

• infrared light

Tags

NGSS.HS-PS4-1

NGSS.HS-PS4-3

Line emission spectrum shown below happens when

• Electron transition from lower to higher energy level.
• Electron transition from higher to lower energy level.
• Electron exist in fixed energy states
• Electron transition between different energy levels.

Tags

NGSS.HS-PS4-3

Emission of light from an atom occurs when an electron

• drops from a higher to a lower energy level.
•    jumps from a lower to a higher energy level.   
•    moves within its atomic orbital.
• falls into the nucleus.

Tags

NGSS.HS-PS1-2

Why are line emission spectra of elements called "atomic fingerprints"?

• They are all the same
• They are all unique
• They are all similar
• They all contain colored light

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

NGSS.HS-PS4-3

All stars are composed of a mixture of elements. When these elements are heated they emit specific amounts of electromagnetic radiation, known as an emission spectrum. Each element emits a unique, identifiable, spectrum.

Using the Bright-line emission spectrum chart below, identify the elements present in this modeled star (found in the line labeled “mixture”).

• Lithium and cadmium are in the mixture. Strontium is not in the mixture.

• Lithium and strontium are in the mixture. Cadmium is not in the mixture

• Cadmium and strontium are in the mixture. Lithium is not in the mixture

• All of the shown elements are present in the mixture.

Tags

NGSS.HS-ESS1-3

The unknown emissions spectra belongs to the element

• Hydrogen

• Mercury

• Neon

• Sodium

Tags

NGSS.HS-PS1-1

NGSS.HS-PS4-3

The unknown emissions spectra belongs to the element

• Hydrogen

• Mercury

• Neon

• Sodium

What gases are in the unknown mixture?

• Gas B & Gas D
• Gas C & Gas B
• Gas A & Gas D
• Gas D & Gas C

Tags

NGSS.HS-PS1-3

NGSS.HS-PS1-5