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Period: to
Development of the Periodic Table
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Discovery of Phosphorous
Hennig Brand attempted to created the Philosopher’s Stone; an object that could turn metals into gold. He heated residues from boiled urine, and a liquid dropped out and burst into flames. This was the first discovery of Phosphorus and the first scientific discovery of an Element. -
First Periodic Table
The first periodic table was created by Alexandre-Émile Béguyer de Chancourtois. He assembled the table by classifying chemical elements in an order based on their periodicity of chemical and physical properties. However, he only published his paper and did not publish his actual graph with the proposed arrangement. -
John Newlands Law of Octaves
John Newlands created the Law of Octaves which stated that 'any given element will exhibit analogous behaviour to the eighth element following it in the table.
He created the Law using the Octaves of Music.
He is the discoverer of the Periodic Law for the chemical elements. -
Dmitri Mendeleev
Dmitri Mendeleev was the creator of the first official Periodic Table that we still use today. He proposed arranging elements by atomic weights and properties. He predicted the discovery of other elements, and left spaces open in his periodic table for them. -
Electrons
Electrons were discovered by J.J.Thomson and Rutherford discovered that electrons orbit the nucleus of an atom. -
Noble Gases
Noble Gases were discovered by Sir William Ramsey. He discovered four gases neon, argon, krypton, xenon and showed that with helium and radon, they formed an entire family of new elements, the Noble Gases. -
Protons
Protons were discoverd by Ernest Rutherford in the atomic nucleus. -
Neutrons
Neutrons were discovered by James Chadwick. He was assigned the task of tracking down evidence of Rutherford's tightly bound "proton-electron pair" and found the neutron
