Electron Configuration Review

Front

What is electron configuration?

Back

Electron configuration is the distribution of electrons in an atom's orbitals, indicating the energy levels and sublevels occupied by electrons.

Front

What does the notation [He] in an electron configuration represent?

Back

[He] represents the electron configuration of Helium, indicating that the configuration includes all the electrons of Helium as a starting point.

Front

How many electrons can the 1st energy level hold?

Back

The 1st energy level can hold a maximum of 2 electrons.

Front

What is the electron configuration for a neutral oxygen atom?

Back

1s² 2s² 2p⁴.

Front

Which element has the electron configuration 1s² 2s² 2p⁶ 3s²?

Back

Magnesium.

Front

What does the superscript in an electron configuration (e.g., 2s²) indicate?

Back

The superscript indicates the number of electrons in that sublevel.

Front

What is the maximum number of electrons in the 2nd energy level?

Back

The 2nd energy level can hold a maximum of 8 electrons.

Front

Which element has the electron configuration [Ne] 3s² 3p¹?

Back

Aluminum.

Front

What is the significance of the principal quantum number in electron configurations?

Back

The principal quantum number indicates the main energy level of the electrons.

Front

What is the electron configuration for Lithium?

Back

1s² 2s¹.