Absolute Zero
Actin
Compund
Amino Acid
Quark
Element
Atom
Acid Precipitation
The lowest theoretically attainable temperature (at which the kinetic energy of atoms and molecules is minimal)
One of the proteins into which actomyosin can be split; can exist in either a globular or a fibrous form.
An elementary particle and a fundamental constituent of matter.
A chemical substance consisting of two or more different chemically bonded chemical elements, with a fixed ratio determining the composition.
Rain containing acids that form in the atmosphere when industrial gas emissions (especially sulfur dioxide and nitrogen oxides) combine with water.
A species of atoms having the same number of protons in their atomic nuclei (i.e. the same atomic number, Z).
The smallest component of an element having the chemical properties of the element
A class of organic compounds containing an amino group and a carboxylic acid group
