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S8P1.a
Distinguish between atoms and molecules
| Term | Definition |
|---|---|
| atom | the smallest unit of an element the maintains the properties of that element. |
| Element | a substance that cannot be separated or broken down into simpler substances by chemical means. |
| Nucleus | in physical science an atom's central region which is made up of protons and neutrons. |
| Protons | a subatomic particle that has positive charge and that is found in the nucleus of an atom |
| Electron | a subatomic particle that has a negative charge |
| Neutron | a subatomic particle that has no charge and that is found in the nucleus of an atom |
| 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 | a subatomic particle that has no charge and the is found in the nucleus of an atom |
| Atomic Mass | the mass of an atom expressed in atomic amss units |
| Chemical Symbols | one or two letter code that represents an element |