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S8P1.a
Distinguish between atoms and molecules.
Term | Definition |
---|---|
Atom | smallest unit of element that maintains properties of the element. |
Elements | substance that cannot be broken down or seperated in smaller substances. |
Nucleus | Atoms central region, made of protons and neutrons. |
Proton | subatomic particle that has a positive charge and that is found in the nucleus of an atom. |
Neutron | subatomic particle that has no charge and that is found in the nucleus of an atom. |
Electron | 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 change. |
Atomic Mass | mass of an atom that describes in atomic mass units. |
Chemical Symbol | a one or two letter code that represents an element. |