s p d f Orbitals Electron configuration: Writing electron configurations is an important topic in chemistry. Students struggle to understand and write them during an exam. Here are some rules that you ...

One hundred fifty years after Russian chemist Dmitri Mendeleev published his system for neatly arranging the elements, the periodic table it gave birth to hangs in every chemistry classroom in the ...

Part of Combined Science Structures, trends, chemical reactions, quantitative chemistry and analysis each shell is at a different distance from the nucleus. The first shell is nearest to the nucleus.