Quantum Mechanics and Electron Configuration

The video tutorial covers the bright line spectra of elements, focusing on identifying elements in a mixture through spectral lines. It explains why the spectrum of element Z remains consistent regardless of sample size, due to its electron configuration. The tutorial also describes how spectral lines are produced by electron transitions between energy states. It provides a detailed breakdown of zinc's electron configuration, including orbital and noble gas configurations, and concludes with a calculation of energy emitted by zinc's spectral lines using quantum numbers.

What evidence from the bright line spectra indicates that element A is not present in the mixture?

• All wavelengths of element A are present in the mixture.

• A specific wavelength of element A is missing in the mixture.

• The mixture has wavelengths not found in element A.

• Element A has more wavelengths than the mixture.

Why do different samples of the same element produce identical spectra?

• They have varying numbers of electrons.

• They emit light at different wavelengths.

• They have the same electron configuration in the ground state.

• They have different electron configurations.

What happens when electrons return from higher to lower energy states?

• They absorb light.

• They produce different colors of light.

• They remain in the same energy state.

• They lose their electron configuration.

What is the complete orbital electron configuration for a neutral atom of zinc in the ground state?

• 1s2 2s2 2p6 3s2 3p6 3d10 4s2

• 1s2 2s2 2p6 3s2 3p6 4s2 4d10

• 1s2 2s2 2p6 3s2 3p6 4s2 3d10

• 1s2 2s2 2p6 3s2 3p6 4s2 3d8

Which noble gas is used in the noble gas configuration for zinc?

• Xenon

• Argon

• Krypton

• Neon

What is the significance of the quantum numbers in electron configuration?

• They determine the element's atomic mass.

• They describe the energy and position of electrons.

• They specify the element's chemical properties.

• They indicate the number of protons in the nucleus.

How is the energy of a photon related to its wavelength?

• Energy is inversely proportional to wavelength.

• Energy is directly proportional to wavelength.

• Energy increases with longer wavelengths.

• Energy decreases with shorter wavelengths.

What is the first step in calculating the energy of a photon from its wavelength?

• Convert wavelength to nanometers.

• Convert wavelength to meters.

• Divide wavelength by the speed of light.

• Multiply wavelength by Planck's constant.

What constant is used in the energy calculation of a photon?

• Avogadro's number

• Planck's constant

• Boltzmann's constant

• Gravitational constant

In what units is the energy of a photon typically expressed?

• Kilojoules per mole

• Calories per mole

• Watts per mole

• Joules per mole