The Bohr model: Journey to find structure of atoms. British physicist Joseph John Thomson made the first major breakthrough in the understanding of atoms in 1897 when he discovered that atoms ...

1856-1940 JOSEPH JOHN THOMSON. ORDER OF MERIT. PHYSICIST. ... His discovery of what we now called electrons, announced in 1897, was the beginning of modern atomic physics. Rose was buried with him on ...

But it was not until around 1803 that the first useful atomic theory of matter was introduced, by British chemist-physicist John Dalton. ... physicist Joseph Thomson ...