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First person to think of the atom. The atom was a solid cirlce.
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He discoverd the four elements of life: air, wind, water, fire. His model was a diamond dividing the elements into it's corners.
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Tiny pieces of mass. His model was a solid circle.
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Dalton's Atomic Theory.
All matter is composed of atoms (T)
Atoms can't be made or destroyed (F)
Atoms of same elements are identical (T)
Different elements=different atoms (T)
Model: circle (not filled in)
Chemical reactions occur when atoms are rearranged (F)
Compounds are formed from atoms of different elements (T) -
Discovered radioactivity
Model:solid circle -
Discovered electrons
Model: Cirlce containing negatively charged electrons and positively charged protons
Cathode Ray Tube -
Measured charge and mass of an electron
Model: negatively charged electrons and a large cross through the center -
Atom has a central positive nucleus surrounded by nagative orbiting electrons
Model: negatively charged electrons surrounding a positive nucleus -
electrons in orbit
positively charged nucleus Model contains 3 rings and a dot in the middle -
mass spectrometer
discovered isotopes Model: 2 rings and a colored in circle in the middle -
Atomic Model
Atom consists of clouds and nucleus
Discovered formula
Calculated odds of where an electron might be
Proved Bohr wrong -
Discovered the neutron Model: vertical and horizontal rings connected through the center