enSCHistory of Atoms8
Isaac Newton : 1704, Proposed a mechanical universe with small solid masses in motion.
John Dalton : 1803, Proposed an "atomic theory" with spherical solid atoms based upon measurable properties of mass.
JJ Thompson : 1897, Studied "canal rays" and found they were associated with the proton H + .
Dmitri Mendeleev : 1869, Arranged elements into 7 groups with similar properties.
Ernest Rutherford : 1911, He also assumed that the electrons were located outside the nucleus.
Niels Bohr : 1922, His atomic model had atoms built up of sucessive orbital shells of electrons.
Schrodinger : 1930, Introduced "wave mechanics" as a mathematical model of the atom.
James Chadwick : 1932, Discovered the neutron.
History of Atoms
1. NWANOIACTES
1704, Proposed a mechanical universe with small solid masses in motion.
2. HJATNNLOOD
1803, Proposed an "atomic theory" with spherical solid atoms based upon measurable properties of mass.
3. PNOHOJSMJT
1897, Studied "canal rays" and found they were associated with the proton H + .
4. LENEIEEMDDIRTMV
1869, Arranged elements into 7 groups with similar properties.
5. NETRHUORFRESRDET
1911, He also assumed that the electrons were located outside the nucleus.
6. BNLSIROHE
1922, His atomic model had atoms built up of sucessive orbital shells of electrons.
7. GORERHNSDCI
1930, Introduced "wave mechanics" as a mathematical model of the atom.