Words of This Topic
- Atomic weight: the number of protons plus the number of neutrons in the nucleus.
- Molecular weight: the sum of the atomic weights of all the atoms in one molecule.
- amu: the unit in which atomic weight and molecular weight are measured.
- Molecular formula: the way of writing symbols that shows which atoms, and how many of each, are in a molecule.
- Nucleus: the central part of an atom, where the protons and neutrons are kept.