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S8P1.a
Distinguish between atoms and molecules.
| Term | Definition |
|---|---|
| Atom | The smallest unit of a element that maintains the properties of that element. |
| Element | A substance that cannot be separated or broken into simpler substances by chemical means |
| Nucleus | In physical science, an atom's 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 that is found in the nucleus of an atom |
| Electron | a subatomic particle that has 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 |