Aka Friedrich Hermann Hund was a German chemist and physicist born on February 4, 1896, in Karlsruhe, Germany. It was he who developed the rule that bears his name, the Hund Rule. He has done important work related to atomic structure and molecules, such as molecular orbitals. He also discovered the Quantum tunneling Principle (barrier in quantum penetration mechanics in spectrography).
The huge increase in the use of cell phones, computers, camcorders, stereos and so many other electronic devices has led to the very high increase in batteries. Many of these batteries are made of heavy metals like mercury, cadmium, nickel and substances that contain these metals.
Metal Bonding Metal bonding is the bond between metals and metals. They form the so-called metal alloys, which are increasingly important to our daily lives. In the solid state, metals are grouped in a geometrically ordered fashion, forming cells, or grids or crystalline reticulum. A metal sample consists of a large number of unit cells formed by cations of this metal.
To represent a molecule, you can use several formulas: - electronic formula - structural formula - molecular formula - geometric formula For example, to represent methane gas, here are the various formulas we can use. Electronic Formula Shows in the formula the electronic pairs between the bonds of atoms.
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The word glycids comes from the Greek glycos, which means sweet. These are sugars, from the most common to the most complex, such as starch and cellulose. Glycerides are compounds that have a mixed organic function polyalcohol-aldehyde or polyalcoholone, among other compounds that, upon hydrolysis, result in polyalcoholdehyde or polyalcoholone.