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S8P1.a
Distinguish between atoms and molecules.
Term | Definition |
---|---|
Atom | the smallest unit of mass that maintains the properties of that element |
Element | a substance that cant be separated or broken down into simpler substances by chemical means |
Nucleus | in physical science, an atoms central region, which is made up of protons & neutrons |
Proton | a subatomic particle that has a positive charge and is found in the nucleus of an atom |
Neutron | a subatomic particle that has no charge & is found in the nucleus of an atom |
Atomic Number | the # of protons in the nucleus of an atom; the atomic # 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 a element |
Electron | a subtonical particle with a negative charge |