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Atomic theory of matter
1) All mater is made up of small particles called atoms
2)All atoms of any given typer ar similar to one another and significantly different from all other types
3) The relative number and arrangement of different atoms in a pure substrance determine its identity.
4)Chemical change is a union separtaion, or rearrangement of atoms to give new substances
5) Only whole atoms can participate in or result from any chemical change, since atoms are considered indestructible during such changes
a notation made up of the chemical symbols of the elements present in a compund and numerical subscript(located to the right of each chemical symbol) that indicate the number of atoms of each element present in a structural unit of the compound
a very small particle that is a building block for atoms
ie proton, neutron, or, electron
pure substance in which all atoms present have the same atomic number(sam number of protons)
percent of atoms in a natral sample of a pure element that are a particular isotope of the element
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