Intro to Electron Configuration

According to the Aufbau Princple,

• electrons occupy the orbitals of lowest energy first

• electrons orbit the nucleus in a cicular path.

• 
  

  electrons can only be found in the lowest energy level

What does electron configuration describe?

• The number of protons in an atom.

• The arrangement of electrons in an atom's orbitals.

• The mass of an atom's nucleus.

• The type of chemical bonds an atom forms.

According to the Pauli Exclusion Principle, what is the maximum number of electrons an orbital can hold, and what are their spins?

• One electron with any spin.

• Two electrons with parallel spins.

• Two electrons with opposite spins.

• Three electrons with opposite spins.

What are the 4 types of orbitals?

• s,p,d,e

• s,p,d,f

• p,n,e,f

True or False. Boron includes the p-subshell.

• True

• False

What does Hund's Rule state about filling orbitals within a subshell?

• Orbitals are filled completely before moving to the next subshell.

• Every orbital in a subshell gets one electron before any orbital gets two, and single electrons have parallel spin.

• Electrons always pair up in the lowest energy orbital first.

• Electrons fill orbitals randomly within a subshell.

True or False. Every orbital in a subshell gets 1 electron before any orbital gets 2 electrons.

• True

• False

Which orbital do you fill first between 4s and 3d?

• 4s

• 3d

How many electrons can one orbital hold?

• 10

• 6

• 14

• 2

What is the primary reason for exceptions to the Aufbau Principle, such as those seen in Chromium and Copper?

• The desire for electrons to occupy higher energy levels.

• The instability of half-filled subshells.

• The particular stability of half-filled or completely filled subshells.

• The repulsion between electrons in different subshells.