Attempted to create a Philosopher’s Stone
Identified phosphorus and had made it public
47 different elements were discovered and was also the time scientist realised the pattern
Johnn had discovered 56 more elements and had grouped then in 11 groups despite their characteristics.
At this time the development of the periodic table was in progress.
discovering that beta particles were negatively charged.
Noble gases was added to the periodic table in group 0
Provided atomic number
He had discovered neutrons and isotopes and was the complete basis for the periodic table
had identified atomic number which is usually placed under the periodic table