Electron Configuration

Front

What is the electron configuration of Magnesium?

Back

1s² 2s² 2p⁶ 3s²

Front

Which element is represented by the electron configuration 1s² 2s² 2p⁶ 3s² 3p⁵?

Back

Chlorine (Cl)

Front

How many total electrons does Silicon (Si) have?

Back

14

Front

What is the electron configuration of Iron (Fe)?

Back

1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁶

Front

Which of the following is a p block element: Ar, Na, or Ca?

Back

Ar (Argon)

Front

What is the maximum number of electrons that can occupy the 3rd energy level?

Back

18 electrons (2n² rule) where n=3.

Front

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

Back

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

Front

Define the Pauli Exclusion Principle in the context of electron configuration.

Back

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

Front

What is the difference between core electrons and valence electrons?

Back

Core electrons are those in filled inner shells, while valence electrons are in the outermost shell and involved in bonding.

Front

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

Back

The number of valence electrons corresponds to the group number in the periodic table for main group elements.