Question

1. what is noble - gas notation, and why is it used to write electron configurations?
2. write the ground - state electron configuration of a germanium atom, using noble - gas notation.

Explanation:

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Noble - gas notation is a shorthand way to write electron configurations. It uses the symbol of the nearest noble gas with a lower atomic number to represent the completed electron shells. It is used because it simplifies the electron - configuration notation, especially for elements with many electrons. Instead of writing out all the electron - shell sub - levels from the beginning (e.g., \(1s^{2}2s^{2}2p^{6}\cdots\)), we can start from the noble - gas core.

Germanium (\(Ge\)) has an atomic number of \(32\). The nearest noble gas with a lower atomic number is argon (\(Ar\), atomic number \(18\)). After the argon core (\([Ar]\)), we need to account for \(32 - 18=14\) more electrons. The electron - filling order after \(Ar\) (\([Ne]3s^{2}3p^{6}\)) is \(4s^{2}3d^{10}4p^{2}\)

Answer:

Noble - gas notation is a shorthand for electron configurations using the symbol of a preceding noble gas. It is used to simplify the notation for elements with many electrons.

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