Electron Quiz

According to Aufbau's principle, electrons fill orbitals in which order?

• From highest to lowest energy

• From lowest to highest energy

• Randomly

• Based on atomic mass

Which of the following is the correct electron configuration for oxygen (atomic number 8)?

• 1s² 2s^2 2p^4$

• $1s^2 2s^2 2p^6$

• $1s^2 2s^2 3s^2$

• $1s^2 2p^6$

Which principle states that no two electrons in an atom can have the same set of four quantum numbers?

• Aufbau's principle

• Hund's rule

• Pauli's exclusion principle

• Heisenberg's uncertainty principle

Which of the following electromagnetic waves has the longest wavelength?

• X-rays

• Ultraviolet light

• Infrared light

• Radio waves

What does Hund's rule state about electron configuration?

• Electrons fill the lowest energy orbitals first

• Electrons will fill an unoccupied orbital before they pair up

• No two electrons can have the same set of quantum numbers

• Electrons fill orbitals in order of increasing energy

Which of the following is a type of electromagnetic wave?

• Sound waves

• Gamma rays

• Seismic waves

• Ocean waves

If the frequency of a wave increases, what happens to its wavelength?

• It increases

• It decreases

• It remains the same

• It doubles