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All Mixed Up - Oxygen
Transcript of All Mixed Up - Oxygen
John Dalton (1766 - 1844)
In 1808, he introduced his research in the form of a model, which he named "Dalton's Atomic Model".
Within his model, he created five laws, which were:
1. All matter is made up of atoms that are unbreakable.
2. All atoms of an element are identical.
3. Atoms of different elements have different
weights and different chemical properties.
4. Atoms that combine to form different
elements are called compounds.
5. Atoms cannot be created nor destroyed.
JJ Thomson (1856 - 1940)
In 1897, he discovered the electron.
In 1904, he developed his own atom
model known as the "Thomson
Ernest Rutherford (1871 - 1937)
Known as the "Father of the Nuclear Age".
In 1911, he discovered that atoms were made up of a charged nucleus orbited by electrons.
He created his own model known as the "Rutherford Model of the Atom."
He successfully split an atom, leading to his discovery of protons.
Niels Bohr (1885 - 1962)
In 1913, he proved that electrons travel in separate orbits around the nucleus.
Bohr discovered that the number
of electrons circling the outer
orbit determines the properties
of a certain element.
In 1932, Chadwick discovered the neutron.
He discovered the neutron by blasting alpha particles into a beryllium
TIMELINE OF THE ATOM STRUCTURE:
James Chadwick (1891 - 1974)
By : Amy NGUYEN
Book: 30-Second Elements by Eric Scerri