A compound in chemistry is a combination of atoms from at least two different elements. Compounds do not contain mixtures of elements. They form through a chemical binding process and are in stable ratios. More » Science Chemistry

Epinephrine or adrenalin is a hormone molecule formed in the adrenal glands of animals by chemical modification of the amino acid tyrosine, according to the National Center for Biotechnology Information. The chemical str... More » Health Medications & Vitamins

In a molecular formula, a subscript is written immediately after the letter denoting an element and refers to the amount of atoms that element has. A molecular formula, or empirical formula, is noted as a series of lette... More » Science Chemistry
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In chemistry, ionic bonds and covalent bonds are both methods atoms use to combine into larger molecules by swapping or sharing outer electrons. An atom's energy level is determined by the number and configuration of ele... More » Science Chemistry

The Grignard reaction is a reaction an organic chemistry that adds an organomagnesium halide compound to a ketone or an aldehyde. The reaction forms a tertiary alcohol from a ketone or a secondary alcohol from an aldehyd... More » Science Chemistry

A cyclic acetal is an organic compound that consists of an acetal carbon and either one or two oxygen atoms in a ring formation. These compounds are considered to be organic because they contain carbon. More » Science Chemistry

A compound is made up of two or more atoms that are bonded together chemically. Compounds can be separated into smaller components through chemical reactions. Water is an example of a compound because it is made from ato... More » Science Chemistry