Atomic Structure

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2.01 Early Theories of the Atom

Matter = anything that has mass and takes up space

Atom = the smallest particle of an element still having the characteristics that element

Electron = negatively charged particle in an atom

Cornerstones of John Dalton's Theory:

all matter is made up of atoms

atoms are very small, indivisible, indestructible particles

all atoms of a given element are identical in mass and other properties

chemical compounds form when two or more kinds of atoms combine