...groups are called compound radicles. The atomic weight of an element is the number of times by which an atom of that element is heavier than an atom of hydrogen. The molecular weight of a body is 'the number of times by which its molecule is heavier than a molecule...

...groups are called compound radicles. The atomic weight of an element is the number of times by which an atom of that element is heavier than an atom of hydrogen. The molecular weight of a body is the number of times by which its molecule is heavier than a molecule...