Electron Configuration

Front

What is electron configuration?

Back

The distribution of electrons in an atom's orbitals, indicating the energy levels and sublevels occupied by electrons.

Front

What does the notation [Ar] represent in electron configuration?

Back

It represents the electron configuration of Argon, which is the noble gas preceding the element in question.

Front

How many electrons can the 3d sublevel hold?

Back

The 3d sublevel can hold a maximum of 10 electrons.

Front

What is the electron configuration for a neutral oxygen atom?

Back

1s² 2s² 2p⁴.

Front

Which element has the electron configuration 1s² 2s² 2p⁶ 3s² 3p⁵?

Back

Chlorine (Cl).

Front

What is the significance of the Aufbau principle in electron configuration?

Back

It states that electrons occupy the lowest energy orbitals first before filling higher energy levels.

Front

What is Hund's rule?

Back

Electrons will fill degenerate orbitals singly before pairing up in the same orbital.

Front

What is the maximum number of electrons in the n=3 energy level?

Back

18 electrons.

Front

What is the electron configuration for Copper (Cu)?

Back

1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁹.

Front

What is the difference between valence electrons and core electrons?

Back

Valence electrons are the outermost electrons involved in bonding, while core electrons are those in inner shells.