Liebig's Definition of a Radical (1838) i) it is invariant in constitution in a series of compounds. ii) it can be replaced by other simple substances. iii) in its compounds with simple substances it can be replaced with other simple substances.
i) it is invariant in constitution in a series of compounds.
ii) it can be replaced by other simple substances.
iii) in its compounds with simple substances it can be replaced with other simple substances.