Match Famous Figures
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Solution
Atomic model describes atoms with a small, dense, positively charged nucleus surrounded by electrons in orbit, with most of the atom being empty space.
1911
The atomic model describes atoms as solid, indivisible spheres. Atoms of the same element are identical, and chemical reactions involve their rearrangement without creation or destruction.
1808
The atomic model describes an atom as having electrons orbiting the nucleus in fixed energy levels, like layers of an onion. Electrons can move between these layers by gaining or losing energy.
The atomic model proposed that atoms consist of a sphere of positive charge with electrons scattered within, balancing the overall charge. This introduced the concept of subatomic particles.
1897
1913
The modern atomic model has a nucleus made of protons and neutrons, with electrons in regions called orbitals around it. Instead of fixed orbits, electrons are described by probabilities of where they may be found.
To Present
Atomic model discovered the neutron (neutral particle) in the nucleus alongside protons. This explained the missing mass in atoms and refined the atomic model by showing that the nucleus contains protons and neutrons, while electrons orbit around it.
1932
Solution
Put this topic into context
JJ Thomson Model, 1897
Niels Bohr Model, 1913
James Chadwick Model, 1932
The Modern Model, To The Present
John Dalton Model, 1808
Ernest Rutherford Model, 1911
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