Electron Configuration

Front

What is electron configuration?

Back

The distribution of electrons in an atom's energy levels and orbitals.

Front

What is the maximum number of electrons that can occupy the first energy level?

Back

2 electrons.

Front

What does the electron dot notation represent?

Back

A representation of an element in which only valence electrons of an atom are shown.

Front

What is the electron configuration for sodium (Na)?

Back

1s² 2s² 2p⁶ 3s¹.

Front

What is the significance of the 's' in electron configurations?

Back

It indicates the type of orbital that can hold electrons, with 's' orbitals being spherical.

Front

How many electrons can the second energy level hold?

Back

8 electrons.

Front

What is the electron configuration for krypton (Kr)?

Back

1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶.

Front

What is the Aufbau principle?

Back

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.

Front

What is the Pauli Exclusion Principle?

Back

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