Molecule

A molecule is a group of two or more atoms that are held together by attractive forces known as chemical bonds; depending on context, the term may or may not include ions that satisfy this criterion. In quantum physics, organic chemistry, and biochemistry, the distinction from ions is dropped and molecule is often used when referring to polyatomic ions.

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Source: Wikipedia · Image: Wikimedia Commons · CC BY 4.0

IDITOL

The science of molecules — organic chemistry, biochemistry and chemical engineering, explained, with the calculators every chemist needs.

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