In this chapter we expand this description to atoms that contain more than one electron and compare atoms that differ in their numbers of protons in the nucleus and electrons surrounding that nucleus.

Writing out the full electron configuration for elements, particularly those with many electrons, can be long and cumbersome. The condensed form simplifies this by using a previous noble gas on the …

Electron Configurations and the Periodic Table The periodic table can be used as a guide for electron configurations. The period number is the value of n. Groups 1A and 2A have the s-orbital filled. …

The electron configuration (the arrangement of electrons in an element) is a direct result of the work of Bohr, Heisenberg, Schroedinger, and other physicists in the early 20th century.

Transition metals do not always exhibit regular patterns in their electron configurations but have some similarities as a whole such as colored compounds and multiple oxidation states.

There are two main ways to write the electron configurations for elements. Using the Periodic Table

Thallium [Xe]6s 2 4f 14 5d 10 ... ... [Xe]6s 2 4f 14 5d 10 ... Polonium [Xe]6s 2 4f 14 5d 10 ... Astatine [Xe]6s 2 4f 14 5d 10 ... Oganesson [Rn]7s 2 7p 6 5f 14 6... Nihonium [Rn]5f 14 6d 10 7s 2 ... 6...