Frankland, Edward (1825–1899)
Edward Frankland was a British chemist who formulated the theory of valence.
This states that each element may be assigned
a whole number (1, 2, 3, or more) or valence which represents the number
of hydrogen atoms with which an atom of the element will combine. Frankland
also discovered, with Joseph Lockyer, the
gas helium in the Sun.