Electron Configuration Quiz

What principle is used to determine the electron configuration of an atom?

• Pauli Exclusion Principle

• Aufbau Principle

• Bohr's Model

• Hund's Rule

How is the electron configuration of Helium represented?

• 2s1

• 2p1

• 1s1

• 1s2

Which element's electron configuration starts filling the 2p subshell?

• Boron

• Beryllium

• Carbon

• Lithium

According to Hund's Rule, how are electrons distributed in orbitals of the same subshell?

• Electrons fill the highest energy orbital first

• Each orbital gets one electron before any gets a second

• Electrons have opposite spins in the same orbital

• All electrons pair up in one orbital first

Why does Chromium have an unusual electron configuration ending in 3d54s1?

• It has a lower energy level

• Half-filled subshells are more stable

• It has more protons than expected

• It follows the Aufbau Principle strictly