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vocab
Term | Definition |
---|---|
atom | the smallest particle of an element that still retains the properties of the element. |
atomic number | number of protons in an atoms nucleus. |
average atomic mass | weighted-average mass of the mixture of an elements isotopes. |
electron | particle surrounding the center of an atom that has a charge of 1-. |
electron cloud | the system of electrons that surround the nucleus of an atom. |
electron dot diagram | the method of writing a chemical symbol for an element that surrounds it with dots. |
group | 2 atoms put together that act as a unit. |
isotope | two forms of the exact element that have equal number of protons. |
mass number | the sum of all protons an all neutrons in a nucleus. |
neutron | a particle that is subatomic that has he same mass of a proton but does not have an electrical charge. |
nucleus | the most absolutely important part of an object, etc. |
period | the given name for a horizontal row on the periodic table. |
periodic table | chemical elements in order of atomic number and in rows. |
proton | a subatomic particle that is positively charged. |
quark | not directly observed subatomic particles that carry a electrical charge. |