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S8P1.a
Term | Definition |
---|---|
Atom | the smallest unit of an element thgat maintains the properties of that element. |
Element | a substance that cannot be separated that can be broken down into simpler substances by chemical means |
Nucleus | in physical science, an atom 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 no 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 | one or two letter code that represents an element. |