Development of atom and periodic table
In 1869 Dimitri Mendeleev, a Russian Chemist, created the Periodic table.
He arranged them by atomic mass.
He left spaces open on it for other elements in which he predicted the discoveries for.
A French Physicist, Antoine Bequerel, discovered Radioactivity.
Marie and Pierre Curie worked on radiation of Uranium and Thorium.
The Curies discovered radium and polonium.
The Curies also discovered that beta particles are negatively charged.
Lord Rayleigh and Sir Ramsay discovered noble glass, which was added to Periodic table as group 0.
In 1897, Thomson discovered Electrons.
In 1900 Bequerel discovered that electrons and beta particles are the same exact thing.
He arranged them by atomic mass.
He left spaces open on it for other elements in which he predicted the discoveries for.
A French Physicist, Antoine Bequerel, discovered Radioactivity.
Marie and Pierre Curie worked on radiation of Uranium and Thorium.
The Curies discovered radium and polonium.
The Curies also discovered that beta particles are negatively charged.
Lord Rayleigh and Sir Ramsay discovered noble glass, which was added to Periodic table as group 0.
In 1897, Thomson discovered Electrons.
In 1900 Bequerel discovered that electrons and beta particles are the same exact thing.
J.J. Thomson: Discovered electron in 1897.
He made his model of the atom in 1904.
He called it the plum pudding model. in 1904.
This model was abandoned by the discovery of the nucleus in 1911.
He proposed that the atom was a sphere of positively charged space with electrons in that space -1897
He made his model of the atom in 1904.
He called it the plum pudding model. in 1904.
This model was abandoned by the discovery of the nucleus in 1911.
He proposed that the atom was a sphere of positively charged space with electrons in that space -1897
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Dalton: He proposed that all matter is made up of atoms-1803
He also proposed that atoms are indivisible and indestructible-1803
Dalton stated that all elements were proportional in mass-1803
He said that compounds are made up of 2+ different elements-1803
He also stated that a chemical reaction is a rearrangement of elements-1803
He also proposed that atoms are indivisible and indestructible-1803
Dalton stated that all elements were proportional in mass-1803
He said that compounds are made up of 2+ different elements-1803
He also stated that a chemical reaction is a rearrangement of elements-1803
Ernest Rutherford: His model contains the nucleus of the atom-1911
In the nucleus, Rutherford describes it as tiny, dense, positively charged space-1911
He states that all the mass is concentrated on the nucleus--1911
He also says that electrons are in the surrounding space of the nucleus-1911
He says that the electrons revolve around the nucleus like planets revolve around the sun-1911
In the nucleus, Rutherford describes it as tiny, dense, positively charged space-1911
He states that all the mass is concentrated on the nucleus--1911
He also says that electrons are in the surrounding space of the nucleus-1911
He says that the electrons revolve around the nucleus like planets revolve around the sun-1911
James Chadwick: He discovered the neutron-1932
He discovered that the beam was not deflected by neither electrical nor magnetic fields, meaning it had neutral charge-1932
He found that neutrons have identical mass with protons-1932
He said that neutrons were found in the nucleus with the protons-1932
Chadwick used the evidence gathered by Irene Curie to discover his findings of the neutron and its characteristics-1932
He discovered that the beam was not deflected by neither electrical nor magnetic fields, meaning it had neutral charge-1932
He found that neutrons have identical mass with protons-1932
He said that neutrons were found in the nucleus with the protons-1932
Chadwick used the evidence gathered by Irene Curie to discover his findings of the neutron and its characteristics-1932
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Henry Moseley: He discovered atomic number and its characteristics-1913
He is credited for the discovery that the atomic number is the same number for all protons, neutrons, and electrons-1913
Contributed a lot to physics throughout his young life-1914
Many believe if he had longer life, he would have had larger contributions to atomic structure-1914
He was the first one to sort the periodic table by its atomic number-1914
He is credited for the discovery that the atomic number is the same number for all protons, neutrons, and electrons-1913
Contributed a lot to physics throughout his young life-1914
Many believe if he had longer life, he would have had larger contributions to atomic structure-1914
He was the first one to sort the periodic table by its atomic number-1914