click below
click below
Normal Size Small Size show me how
S8P1.a
Distinguish between atoms and molecules
| Term | Definition |
|---|---|
| Atom | The smallest unit of an element the maintains the properties of the element |
| Element | A substance that can't be separated or broken down into simpler substances by chemical means |
| Nucleus | In physical, an atomÅ› central region, which is made up of protons and neutrons |
| Proton | A subatomic particle that has a positive charge and that is found in the nucleus of an atom |
| Neutron | A subatomic particle that has no charge and is found in the nucleus of an atom |
| Electron | A subatomic particle with a negative charge |
| Atomic number | The number of protons in the nucleus of an atom; the atomic number is the same for all atoms of an element |
| Neutral | Having no overall charge |
| Atomic Mass | The mass of an atom expressed in atomic mass units |
| Chemical symbol | A one or two letter code that represents an element |