Electron Emissions

The unknown emissions spectra belongs to the element

• Hydrogen

• Mercury

• Neon

• Sodium

Tags

NGSS.HS-PS4-3

NGSS.HS-PS4-1

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-PS1-2

NGSS.HS-PS1-1

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

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-PS1-2

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

The unknown emissions spectra belongs to the element

• Hydrogen

• Mercury

• Neon

• Helium

Tags

NGSS.HS-PS1-2

An atom that has gained energy beyond normal is said to be ...

• excited

• grounded

• naturalized

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-1

When an atom has all of its electrons in the lowest energy orbitals available, the atom is  

• in ground state
• in excited state
• giving off light energy
• unstable

Light is emitted when electrons

• move from one atom to another.

• collide with one another, releasing energy.

• move from a lower energy level to a higher energy level.

• move from a higher energy level to a lower energy level.

Tags

NGSS.HS-PS4-3

In order to go from ground state to an excited state, an electron must

• emit energy

• absorb energy

• rotate

• wiggle