Electron Configuration and Orbital Notation

Front

What is the electron configuration of Copper (Cu)?

Back

1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁹

Front

What does Hund’s rule state?

Back

All orbitals of equal energy are occupied by one electron before any single orbital is occupied by a second electron.

Front

What is the Aufbau Principle?

Back

Electrons occupy the lowest energy orbitals first before filling higher energy orbitals.

Front

What is the Pauli Exclusion Principle?

Back

No two electrons in an atom can have the same set of four quantum numbers.

Front

What is an orbital diagram?

Back

A graphical representation of the arrangement of electrons in an atom's orbitals.

Front

What does it mean for electrons to have opposite spins?

Back

Electrons in the same orbital must have opposite spins, represented by arrows pointing in opposite directions.

Front

What is the significance of the 4s orbital in relation to the 3d orbital?

Back

The 4s orbital is filled before the 3d orbital due to its lower energy level in the Aufbau principle.

Front

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

Back

Two electrons, with opposite spins.

Front

What is the difference between core notation and full electron configuration?

Back

Core notation uses the nearest noble gas to simplify the electron configuration.

Front

What is an example of an element that violates the Aufbau Principle?

Back

Copper (Cu) has an electron configuration of 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁹, which is an exception.