Electron Configurations and Dot Diagrams

Front

What is the Aufbau principle?

Back

The Aufbau principle states that electrons occupy the lowest energy orbitals first before filling higher energy orbitals.

Front

What does Hund's rule state?

Back

Hund's rule states that orbitals must be singly occupied before any orbital is doubly occupied.

Front

What is the Pauli Exclusion Principle?

Back

The Pauli Exclusion Principle states that no two electrons in an atom can have the same set of four quantum numbers.

Front

What is the electron configuration for a neutral sulfur atom?

Back

The electron configuration for a neutral sulfur atom is 1s² 2s² 2p⁶ 3s² 3p⁴.

Front

How do you determine the number of valence electrons in an element?

Back

The number of valence electrons is determined by the group number of the element in the periodic table.

Front

What is the noble gas configuration for Argon?

Back

The noble gas configuration for Argon is [Ne] 3s² 3p⁶.

Front

Which elements have d sublevel electrons?

Back

Transition metals, such as Iron (Fe), have d sublevel electrons.

Front

What is the significance of valence electrons?

Back

Valence electrons determine an atom's chemical properties and its ability to bond with other atoms.

Front

How many valence electrons does iodine have?

Back

Iodine has 7 valence electrons.

Front

What is the electron configuration for Gold?

Back

The electron configuration for Gold is [Xe] 6s² 4f¹⁴ 5d⁹.