Plancks Equation

What is the frequency of UV light that has an energy of 2.39 × 10 ^-18 J? 

• 2.32 x 10⁹ Hz
• 3.60 x 10¹⁵ Hz
• 1.58 x 10^-51 Hz
• 3 x 10⁸  m/s

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

• increases.
• decreases.
• stays the same.

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The emission spectra is produced when

• electrons release energy as they move to their excited state.

• electrons absorb energy as they move to their excited state.

• electrons release energy as they return to the ground state.

• electrons absorb energy as they return to the ground state.

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This picture is associated with which phenomenon?

• Blackbody radiation

• Photoelectric effect

• Atomic spectra

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In Planck's energy equation, what is

c

• speed of light

• Planck's constant

• energy

• wavelength

• frequency

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In Planck's energy equation, what is

λ

• speed of light

• Planck's constant

• energy

• wavelength

• frequency

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In Planck's energy equation, what is

E

• speed of light

• Planck's constant

• energy

• wavelength

• frequency

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In Planck's energy equation, what is

h

• speed of light

• Planck's constant

• energy

• wavelength

• frequency

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Ionisation energy is ___________.

• maximum energy required to remove 1 electron from 1 mol of gaseous atom

• minimum energy required to remove 1 electron from 1 mol of gaseous atom

• first ionisation energy

• second ionisation energy

Which equation correctly describes the first ionization energy of X?

• X --> X^- + e^-

• X --> X⁺ + e^-

• X --> X^- + e⁺

• X + e^- --> X^-

• X + e^- --> X⁺

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