What is the noble-gas notation?

Answer 1

The noble gas notation is a notation formed as a result of the electron configuration notation being used in conjunction with noble gases.

The noble gas preceding the element in question is written then the electron configuration is continued from that point forward.

The notation is shorter to write and makes it easier to identify elements.

The noble gas notation starts for elements after helium.

For example, the electronic configuration of carbon is 1s2 2s2 2p2, whereas its noble gas notation is [He] 2s2 2p2.

Answer 2

Noble-gas notation is a shorthand way of representing the electron configuration of an element by using the nearest noble gas that precedes the element in the Periodic Table. The noble-gas notation simplifies electron configuration by replacing the inner electron configuration with the symbol of the nearest noble gas and then representing the remaining electrons.