AP CHEMISTRY UNIT 3 REVIEW

Front

What type of bonding is present in Copper (II) nitride, Cu₃N₂?

Back

Ionic bonding.

Front

What happens to the energy of an electromagnetic wave as its frequency increases?

Back

The energy increases.

Front

What does a high Rₓ value indicate in chromatography?

Back

Strong affinity to the mobile phase.

Front

Calculate the frequency of a photon with a wavelength of 4.22x10⁻⁷ nm using the formula v=c/λ.

Back

7.11x10¹⁴ Hz.

Front

The energy of a photon is directly proportional to its _____ and inversely proportional to its ______.

Back

Frequency - Wavelength.

Front

Define ionic bonding.

Back

Ionic bonding is the electrostatic attraction between oppositely charged ions.

Front

What is the relationship between wavelength and frequency in electromagnetic waves?

Back

Wavelength and frequency are inversely related; as one increases, the other decreases.

Front

What is the formula to calculate the energy of a photon?

Back

E = h * v, where E is energy, h is Planck's constant, and v is frequency.

Front

What is the significance of Planck's constant in quantum mechanics?

Back

Planck's constant relates the energy of a photon to its frequency.

Front

Explain the concept of Rf value in chromatography.

Back

Rf value (retention factor) is the ratio of the distance traveled by the compound to the distance traveled by the solvent front.