5-4 Aufbau Principle

What does the Aufbau principle describe?

• How protons fill the nucleus

• How electrons fill orbitals in an atom

• How neutrons are distributed in an atom

• How atoms bond with each other

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What is the first step in the Aufbau principle analogy?

• Building the roof

• Starting with the foundation

• Painting the walls

• Installing windows

Tags

NGSS.HS-PS1-1

What is the maximum number of electrons an orbital can hold?

• One

• Two

• Three

• Four

What does the word "Aufbau" mean in German?

• Breaking down

• Building up

• Spinning around

• Falling apart

In what order are electrons added to orbitals according to the Aufbau principle?

• From highest to lowest energy

• Randomly

• From lowest to highest energy

• Based on atomic number

Which type of orbital is NOT mentioned in the text?

• s

• p

• d

• g

Which of the following is a type of orbital?

• g

• h

• f

• j

What is the order of filling orbitals in atoms?

• Random order

• Based on atomic mass

• Specific sequence

• Based on temperature

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which orbital is filled before the 3d orbital according to the Aufbau principle?

• 2p

• 3s

• 4s

• 1s

Why is the electron configuration for calcium written as 4s² instead of 3d?

• 4s is higher in energy than 3d

• 4s is lower in energy than 3d

• 3d is filled first

• 3d is skipped entirely