Urea is a crystalline chemical that lacks color and melts at 271 degrees Fahrenheit. It is found in all mammals as a biological byproduct. Due to its nitrogen content, urea is often used in fertilizers and animal feed and is very useful for plants and farming.Know More
While urea is found in urine, it is also expelled from many other places of the body due to the prevalence of the substance throughout mammalian biology. It's produced from the ammonia produced during the breakdown of proteins, with the liver converting it from more harmful ammonia molecules into the less dangerous urea which is then expelled from the body.
A related compound known as uric acid is expelled from some reptiles and birds, as well as humans. In humans, it is generated in small amounts compared to other waste products, and if it builds up, can cause issues such as gout, which involves the development of salt in bone and cartilage.
Urea was the first accepted organic compound to be synthesized from inorganic compounds. As a result of the ability to synthesize it, methods of synthesis were developed using liquid ammonia and liquid carbon dioxide, allowing for the creation of very large quantities of urea for use in farming and more.Learn more about Atoms & Molecules
Krypton is a noble gas with an atomic number of 36 and a standard atomic weight of 83.79. Other chemical properties of Krypton include a heat of fusion of 1.63 kilojoules per mole.Full Answer >
Mercury is a naturally occurring metal that is liquid at room temperature. This heavy metal is toxic to humans. It is silver in color, and its high surface tension causes it to form into round drops on surfaces. Mercury is more volatile than any other metal and forms a colorless, odorless gas.Full Answer >
Oxygen gas is free from odor, taste and color, combines with the majority of other elements, supports combustion, is very paramagnetic and has a pale blue color in both its solid and liquid forms. Oxygen is also a part of over 100,000 organic compounds.Full Answer >
The chemical properties of an element are determined by the electrons in the partly filled outermost shell. This shell is referred to as the valence shell. There are one or more subshells in each shell, and each subshell is made up of one or more atomic orbitals.Full Answer >