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Robert Boyle discovered phosphorus
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Hydrogen was discovered
Hydrogen was discovered by Henry Cavendish in The United Kingdom. -
Characteristics of Elements
Scientists began to see characteristics as at least 47 elements were discovered. -
Friedrick Stromeyer discovered Cadium.
Friedrick Stromeyer discovered Cadium. The name came from the Latin name for the mineral calamine ‘Cadmia’ -
Elements arranged into groups
English chemist John Newlands divided the 56 elements into 11 groups based on attributes -
Antoine Bequerel discovered radioactivity.
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Noble gases were discovered
Noble gases were discovered by William Ramsay and Lord Rayleigh. Noble gases were added to the periodic table as group 0 -
Electrons were discovered by physicist J.J Thomson
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Pierrie and Marie Curie discovered radium
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Lutetium was discovered
Urbain discovered Lutetium in Paris France in New Hampshire USA. The name came from from the Romans name for Paris ‘Lutetia’ -
English physicist Henry Moseley found a connection between
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ames Chadwick discovered neutrons and he identified isotopes
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The Neptunium element was discovered
The Neptunium element was discovered by E.M McMillian and was named after the planet Neptune. -
Lanthanide and Actinides were identified a
Lanthanide and Actinides were identified and were given an atomic number of 92. They placed these elements below the periodic table. -
Atomic weight
John Newland arranged the known elements in order of atomic weights and similarities. -
Developmennt
Dimitri Mendeleev was a Russian chemist that started the development of the periodic table. He arranged the known elements by atomic mass and left free spaces for future discovered elements.