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For an atom or an ion with only a single electron, we can calculate the potential energy by considering only the electrostatic attraction between the positively charged nucleus and the negatively charged electron.
The electron configuration will tell you what energy level, subshell, and how many electrons occupy that subshell. The electron configuration in the picture above tells us that the electrons are housed in energy level one in the s subshell with only two electrons.
The four you need to know are s (sharp), p (principle), d (diffuse), and f (fine or fundamental). So, s,p,d & f. The Principal Energy Level (the #) only holds that # of sublevels. Yes, the 5th energy level holds 5 sublevels and that last one would be 5g. The number of electrons in each sublevel.
Interactive periodic table showing names, electrons, and oxidation states. Visualize trends, 3D orbitals, isotopes, and mix compounds. Fully descriptive writeups.
Subshells and Periodic Table. Elements are grouped in blocks that refer to the subshell that contains the highest energy electron. For example, any element in the row 3d will have it's highest energy electron in sub-shell d of the 3 rd shell, whereas an element in row 4d will have the highest energy electron in sub-shell d of the 4 th shell.
To determine the electron configuration of a particular atom, start at the nucleus and add electrons one by one until the number of electrons equals the number of protons in the nucleus. Each added electron is assigned to the lowest-energy sublevel available.
Text. 4. Orbitals in Atoms. In the center of the atom is the nucleus made of protons and neutrons. Around the nucleus is the space where electrons exist. Electrons are always moving in this space. Atoms have electrons which orbit around the nucleus. The location where electrons can be found are called atomic orbitals. Image source: By Cassie Gates.
