Structure 1.3,1, 1.3.2 &1.3.3

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

• Absorb energy
• Release energy

What is the light that you can see called?

• observatory light

• ultraviolet light

• visible light

• infrared light

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.

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

Which type of spectrum is this?

• Emission Spectrum

• Absorption Spectrum

• Continuous Spectrum

As the frequency of an electromagnetic wave increases, the amount of energy in that wave ___________.

• increases.
• decreases.
• stays the same.

In Planck's energy equation, what is c?

• speed of light

• Planck's constant

• energy

• wavelength

• frequency

. What will happen to a photon as result of decreasing its wavelength?

• Its energy will increase

• Its energy will decrease

• ts energy will not be affected

• Its frequency will decrease

A radiation having a frequency of 656nm causes the red line on the atomic spectrum of Hydrogen.

Select the suitable energy levels of transition to form the above relevant line on the spectrum.

• n=2 to n-5

• n=2 to n=3

• n=3 to n=2

• n=3 to n=4

• n=5 to n=2

A radiation having a frequency of 486nm causes the cyan line on the atomic spectrum of Hydrogen.

Select the suitable energy levels of transition to form the above relevant line on the spectrum.

• n=4 to n=2

• n=2 to n=3

• n=3 to n=2

• n=3 to n=4

• n=5 to n=2