Electrons in Atoms- Electron Configuration

Fill in the Blank

The region in space where there is a high probability of finding an electron is called an ___.

Multiple Choice

Which of the following best describes the Heisenberg Uncertainty Principle?

• It states that the exact position and momentum of an electron cannot both be known at the same time.

• It states that electrons orbit the nucleus in fixed paths.

• It states that electrons have a definite energy but no definite position.

• It states that electrons are always found in pairs.

Multiple Choice

Which of the following statements about electron configuration is correct?

• The ground state is the highest energy arrangement of electrons.

• Electrons fill orbitals starting from the highest energy level.

• The ground state is the most stable arrangement of electrons.

• Electrons always pair up before occupying empty orbitals.

Fill in the Blank

The lowest energy electron configuration is called the ___ state electron configuration.

Multiple Choice

According to the Aufbau Principle, which orbital will be filled first: 2s, 2p, 3s, or 3p?

• 2s

• 2p

• 3s

• 3p

Multiple Choice

Which statement best explains the relationship between orbitals within the same energy sublevel?

• They are of equal energy.

• They have different energies.

• They are always empty.

• They are always filled first.

Fill in the Blank

The sequence of energy sublevels within a principal energy level is ___ .

Multiple Choice

Which of the following statements about orbitals and sublevels is correct?

• Orbitals related to energy sublevels can overlap with sublevels of a different principal level.

• All orbitals have the same energy regardless of sublevel.

• Orbitals never overlap between principal levels.

• Only s orbitals can overlap.

Fill in the Blank

An empty box in an orbital diagram represents an ___ orbital.

Multiple Choice

According to the Pauli Exclusion Principle, what is NOT allowed in a single atomic orbital?

• Two electrons with the same spin

• Two electrons with opposite spins

• One electron with spin up and one with spin down

• An unoccupied orbital

Multiple Select

Which of the following statements are true according to Hund's Rule?

• Single electrons with the same spin occupy each equal-energy orbital first.

• Electrons pair up in an orbital only after each orbital has one electron.

• Electrons in the same orbital must have the same spin.

• Additional electrons with opposite spin can occupy the same orbital after each orbital has one electron.