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pressure exerted by the mass of the atmosphere; the weight of the atmosphere on Earth's surface...
the smallest particle of an element that can exist on its own (the basic building block of...
(amu) is equal to 1/12 of the mass of the 12C atom.
the number of protons in the nucleus of an atom, which determines which element it is. In a...
the radius of an atom from the nucleus to the outermost electrons.
(adenosine triphosphate), a compound used by cells for energy storage.
specialised heart muscle tissue between the right atrium and right ventricle which conducts the...