He was one of the first scientists to discover an atom. He suggested that all matter was made up of small units called atoms.
John Dalton
1803
He was considered to be one of the most influential men in atomic structure history. Dalton thought a solid sphere represented an atom.
Dmitri Mendeleev
1869
One of the most important discoveries in history came from him. He discovered the periodic table of elements.
Sir William Crookes
1879
He had many achievements, one of them being that one of his first discoveries was Thallium.
JJ Thomson
1897
He discover the electrons and he was said to be the first person to show that atoms are made up of even smaller particles.
Rutherford
1898
He was the man who discovers protons and the nucleus. He suggested that electrons orbited the nucleus of an atom.
Nagaoka
1903
He came up with the Planetary model that claimed the charged centre is surrounded by revolving electrons on rings.
Abegg
1904
He came up with many different advances in atomic structure. He also discovered that the noble gases were stable due to there being eight electrons at the outermost shell.
Hans Geiger
1906
He invented the Geiger counter that measures radiation and he introduced the first successful detector.
R.A. Millikan
1909
He determined the unit charge for electrons by using an oil drop experiment to charge a single electron.