Practice Exercises Shorthand Electron Configuration

Front

What are valence electrons?

Back

Valence electrons are the electrons in the outermost shell of an atom that are involved in forming bonds with other atoms.

Front

How many valence electrons does the electron configuration 1s2 2s2 2p6 3s2 3p6 4s2 have?

Back

2

Front

What is the electron configuration for Sodium (Na)?

Back

Front

What is the maximum number of electrons that can occupy the d subshell?

Back

The d subshell can hold a maximum of 10 electrons.

Front

Which electron configuration is an exception for transition metals?

Back

Front

What is the correct electron configuration for Iron (Fe)?

Back

Front

What is the Aufbau principle?

Back

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

Front

What is Hund's rule?

Back

Hund's rule states that electrons will fill degenerate orbitals singly before pairing up.

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

How many orbitals are in the p subshell?

Back

The p subshell contains 3 orbitals.