Emission Spectra

The parallel lines represents...

• energy levels of the atom

• energy levels of the electrons

• energy levels of the photons

• energy levels of the nucleus

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

• absorbs energy

• releases energy

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

Why do the spectra of individual elements only have certain bands of colors?

• they don't have enough electrons

• not all of the electrons are changing energy levels

• electrons are only allowed to have certain energies

• some electrons are moving up levels while some are moving down

Tags

NGSS.HS-PS1-2

NGSS.HS-PS4-3

Which element had spectral lines at roughly 655 nm, 490 nm, 430 nm?

• Hydrogen

• Helium

• Neon

• Mercury

Atoms emit light when...

• electrons move down to lower energy levels

• electrons move up to higher energy levels

• electrons move in circular orbits around the nucleus

• electrons crash into the nucleus

Tags

NGSS.HS-PS4-3

Which element had spectral lines at roughly 575 nm, 548 nm, 430 nm?

• Hydrogen

• Helium

• Neon

• Mercury

Which element had the most spectral lines in the red region?

• Hydrogen

• Helium

• Neon

• Mercury

Which part of the electromagnetic spectrum is emitted by the sun?

• only visible light

• only yellow light

• visible light and ultra violet light

• the entire electromagnetic spectrum

Tags

NGSS.HS-PS4-3

Which color has the highest energy?

• red

• yellow

• green

• violet

Tags

NGSS.HS-PS4-4