Emission

What is the light that you can see called?

• observatory light

• ultraviolet light

• visible light

• infrared light

Tags

NGSS.HS-PS4-3

NGSS.HS-PS4-1

What experimental results support the theory that electrons exist in discrete energy levels?

• H NMR

• X-ray diffraction patterns

• Emission spectra

• Infrared spectra

Tags

NGSS.HS-PS4-3

A transition to n=2 emits what type of light/radiation?

• UV

• Visible

• Infrared

• Microwaves

Tags

NGSS.HS-PS4-3

A transition to n=1 emits what type of light/radiation?

• UV

• Visible

• Infrared

• Gamma rays

Tags

NGSS.HS-PS4-3

A scientist has a sample of an unknown gas. In order to identify the gas, they look at the spectrum of visible light emitted from it when it is heated. This is shown in the figure. Also shown in the figure are the emission spectra of five pure, gaseous elements. Which of the five elements is the unknown gas?

• helium

• neon

• xenon

• oxygen

• argon

Tags

NGSS.HS-PS4-3

NGSS.HS-PS4-1

A scientist has a sample of an unknown gas. In order to identify the gas, they look at the spectrum of visible light emitted from it when it is heated. This is shown in the figure. Also shown in the figure are the emission spectra of three pure, gaseous elements. Which of the three elements is the unknown gas?

• helium

• hydrogen

• oxygen

Tags

NGSS.HS-PS4-1

An astronomer looks at the spectrum of light from a distant star. The spectrum they see is shown in the figure. They compare the emission lines within the spectrum to the emission lines in the spectra of pure elements, which are also shown in the figure, in order to identify which elements are present in the outer layers of the star. State all of the elements that are present in the outer layers of the star.

• hydrogen, helium, and carbon

• hydrogen, helium, and boron

• helium, oxygen , and carbon

• hydrogen, helium, boron, and carbon

A scientist has a gas canister that contains a mixture of unknown gases. In order to identify which gases are in the mixture, they look at the spectrum of visible light emitted from it when it is heated. This is shown in the figure. Also shown in the figure are the emission spectra of several pure, gaseous elements. Which of the five elements does the mixture contain?

• helium, oxygen, nitrogen, and argon

• oxygen, hydrogen, and nitrogen

• hydrogen, helium, and nitrogen

• hydrogen and argon

Tags

NGSS.HS-PS4-1

NGSS.HS-PS1-1

NGSS.HS-PS1-2

According to the emission spectra, the surface temperature of the star Vega is ____ that of the Sun.

• higher than

• lower than

• equal to

Which of the following phenomena is explained by the emission of photons from excited atoms?

• Photoelectric effect

• Emission spectra

• Thermal conduction

• Nuclear fission

Tags

NGSS.HS-PS4-3