Electron Configurations and Orbital Notation

Front

What is Hund's Rule?

Back

Hund's Rule states that all orbitals of equal energy are occupied by one electron before any single orbital is occupied by a second electron.

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 Aufbau Principle?

Back

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

Front

What is the electron configuration for a chloride ion (Cl)?

Back

1s² 2s² 2p⁶ 3s² 3p⁵.

Front

How many valence electrons does Silicon (Si) have?

Back

Silicon (Si) has 4 valence electrons.

Front

What is the electron configuration for an atom with 15 electrons?

Back

1s² 2s² 2p⁶ 3s² 3p³.

Front

Define valence electrons.

Back

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

Front

What is the significance of electron configurations?

Back

Electron configurations describe the distribution of electrons in an atom's orbitals, which determines its chemical properties.

Front

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

Back

A single orbital can hold a maximum of 2 electrons.

Front

What is the difference between core electrons and valence electrons?

Back

Core electrons are the inner electrons that are not involved in bonding, while valence electrons are the outermost electrons that participate in chemical reactions.