Atomic Spectra

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

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

NGSS.HS-PS1-1

The unknown emissions spectra belongs to the element

• Hydrogen

• Mercury

• Neon

• Sodium

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

The unknown emissions spectra belongs to the element

• Hydrogen

• Mercury

• Neon

• Sodium

Tags

NGSS.HS-PS4-3

Which element(s) is/are found in the star's spectra below?

• Hydrogen only

• Hydrogen & Helium

• Calcium only

• Hydrogen & Calcium

Tags

NGSS.HS-PS4-3

Which elements are in the unknown sample?

• A and B

• B and C

• A and D

• B and D

Tags

NGSS.HS-PS1-1

If an electron moves from n=4 to n=2 it ____

• absorbs energy

• releases energy

Tags

NGSS.HS-PS4-3

Look carefully at the picture. It shows an electron in the excited state on the left, and the electron returning to its ground state on the right. When the electron return to the ground state it emits a_______________________.

• blast of cold air

• electrostatic charge

• proton

• photon (light)

Tags

NGSS.HS-PS4-3

Each element produces its own pattern of emission spectra lines because each element has its own distinct

• Speed of light

• Electron configuration

• Number of neutrons

• None of these

Tags

NGSS.HS-PS1-1