The birthplace of stars begins within large, cold clouds of gas and dust, which eventually collapse under the weight of ...

You can work out the molecular formula from the empirical formula, if you know the relative mass formula (M r) of the compound. Add up the atomic masses of the atoms in the empirical formula.

Physicists study this interaction on various scales, from the atomic to molecular level, in order to explore critical scientific questions. AMO physicists strive to understand and control atoms, ...

RECENT work has shown that many long-chain polymers 1,2 can be cross-linked by high-energy radiation; although polymers containing only carbon atoms in the main chain have been studied in great ...