definitions- atomic structure and compounds
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11 Terms
atomic number?
the number of protons in the nucleus of an atom
electron?
a negatively charged particle that orbits the nucleus at various energy levels
ion?
a charged atom or molecule
isotopes?
atoms of the same element with the same number of protons and electrons but different number of neutrons and therefore different mass numbers
neutron?
a neutral subatomic particle found in the nucleus of an atom
proton?
a positively charged subatomic particles found in the nucleus of an atom
relative atomic mass?
the weighted mean mass of an atom compared with 1/12th mass of an atom of carbon-12
relative isotopic mass?
the mass of an atom of an isotope compared with 1/12th mass of an atom of carbon-12
relative formula mass?
the mass of the formula unit of a compound with a giant structure
relative molecular mass?
the mass of a simple molecule
ionic compound?
a compound which is made up of oppositely charged ions that are held together by electrostatic forces
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