An element is a substance that is made up of only one kind of atom ... Used to treat breathing problems A compound is a substance that contains atoms of two or more different elements, chemically ...

They may fluctuate (up or down) as the Fed rate changes. Select will update as changes are made public. Some offers mentioned below are no longer available. Compound interest is a term you've ...

A nucleic acid is a long molecule made up of smaller molecules called nucleotides ... Swiss physician Friedrich Miescher isolated a new compound from the nuclei of white blood cells.

Everything we can see and touch, and quite a lot that we can’t as well, is made of tiny particles called atoms. Some substances, like particles of this iron, contain only one kind of atom.