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He proposed that matter is composed of tiny, indivisible particles they called atomos which means “uncutable” in Greek.
DEMOCRITUS
He proposed that matter is composed of vey small, spherical, indivisible particles called atoms.
John Dalton’s Atomic Theory
He said that atoms are chemically combine in simple, fixed, whole-number ratios to form compounds.
Dalton’s Model
He discovered the negatively charged components inside the atom through his experiments on cathode ray tubes.
J.J Thomson
He concluded that the atom must contain a small, dense, positively charged region at its center, which he called the nucleus.
Ernest Rutherford
He proposed the planetary model.
Niels Bohr 1913
Electrons have no predictable pattern and move in a region where electrons are likely to found called the electrons cloud.
Erwin Shrodinger & Werner Heisenberg.
It states that matter is composed of discrete units called atoms, as opposed to the obsolete notion that matter could be divided into any arbitrarily small quantity.
ATOMIC THEORY
What do you call to the experiment of Ernest Rutherford?
alpha particle scattering experiment/ GOLD FOIL EXPERIMENT
