There are many types of rules for electron configuration. Look at the aufbau principle and Hund's rules.
The coefficient represents the orbital. Do not use mathematics to try to solve the configurations.
1s2 2s2 2p6 : Neon's Electron Configuration
The letter following the coefficient describes which type of orbital it is, being s,p,d, or f.
The superscript denotes the number of electrons it contains. If you add 2, 2, and 6, you would get 10, Neon's atomic number.
The electron configuration for oxygen is [He]2s2.2p4.The electron configuration for sulfur is [Ne]3s2.3p4.
A cation has a depleted electron configuration.
The electron configuration for beryllium, Be, is 1s22s2.
The electronic configuration of einsteinium is: [Rn]5f11.7s2.
Hydrogen electron configuration will be 1s1.
The electron configuration of francium is [Rn]7s1.
The electron configuration of beryllium is written as [He] 2s2. This means that it has 2s2 electrons above the configuration of Helium.
Uranium electron configuration: [Rn]5f36d17s2
The electron configuration of beryllium is 1s2 2s2.
The electron configuration for germanium is [Ar]3d10.4s2.4p2.
The electron configuration of boron is [He]2s2.2p1.
The electron configuration for V3 is Ar 3d2.