2.3 - 2.4 Savvas Chemistry Electron configuration, Moderna Atom

What does Heisenberg's uncertainty principle state about the position and momentum of an electron?

• Both position and momentum can be precisely measured at the same time.

• The more precisely the position is known, the less precisely the momentum is known.

• Electrons do not have a definite position or momentum.

• Electrons can be found in fixed orbits around the nucleus.

How did the quantum mechanical nature of the electron contribute to modern atomic theory?

• It introduced the concept of electrons orbiting in fixed paths.

• It led to the development of the Bohr model.

• It introduced the concept of electron probability clouds.

• It suggested that electrons are stationary particles.

What is an atomic orbital?

• A fixed path where electrons revolve around the nucleus.

• A region in space where there is a high probability of finding an electron.

• A specific energy level of an electron.

• A particle that orbits the nucleus.

Which of the following is the correct electron configuration for a carbon atom?

Tags

NGSS.HS-PS1-1

How many valence electrons does an oxygen atom have?

• 2

• 4

• 6

• 8

Tags

NGSS.HS-PS1-1

• Sulfur (S)

• Chlorine (Cl)

• Phosphorus (P)

• Argon (Ar)

Tags

NGSS.HS-PS1-1

What is the shape of an s orbital?

• Dumbbell

• Spherical

• Double dumbbell

• Planar

Which principle states that electrons fill the lowest energy orbitals first?

• Hund's Rule

• Pauli Exclusion Principle

• Aufbau Principle

• Heisenberg Uncertainty Principle

What is the maximum number of electrons that can occupy a single p orbital?

• 1

• 2

• 3

• 6

Which of the following is the correct electron dot structure for a sodium atom?