26 terms

Atomic Theory Scientists

The scientists contributions to the Atomic Theory are listed on each card, MATCH the correct scientist to the contribution. I have also included the vocab about the structure of an atom.
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Atoms are hard small particles
Democritus, 440 BCE
Atoms are uncuttable
Democritus, 440 BCE
Atoms are made of a single material formed into different shapes and sizes
Democritus, 440 BCE
Atoms of different elements are different
Dalton, 1803
He conducted experiments in combining elements
Dalton, 1803
Atoms of the same element are exactly alike
Dalton, 1803
All substances are made of atoms
Dalton, 1803
He wanted to know why elements combine in specific proportions
Dalton, 1803
There are small, negatively charged particles inside an atom
Thomson, 1897
He conducted the Cathode-ray tube experiment
Thomson, 1897
Came up with the "plum pudding' model of the atom.
Thomson, 1897
Most of an atom's mass is in the nucleus
Rutherford, 1909-1911
There is a small, dense, positively charged nucleus
Rutherford, 1909-1911
Atoms contain mostly empty space
Rutherford, 1909-1911
His model had electrons surrounding the nucleus at a distance
Rutherford, 1909-1911
He conducted the gold foil experiement
Rutherford, 1909-1911
Electrons can jump from a path in one level to a path in another level.
Bohr, 1913
Electrons travel in certain or energy levels.
Bohr, 1913
Electron path cannot be predicted
Schrodinger & Heisenberg, 20th Century
Electrons are found in clouds around the nucleus
Schrodinger & Heisenberg, 20th Century
Proton
positively charged particle, in the nucleus of an atom
Neutron
neutrally charged particle, in the nucleus of an atom
Electron
negatively charged particle, found in the electron cloud around the nucleus
Nucleus
dense, positively charged area of an atom
Atom
the smallest unit of an element that maintains the properties of the element
Electron Cloud
region around the nucleus of an atom where electrons are likely to be found
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