The question probably refers to 'the modern theory of electron clouds'. This theory is now almost a century old and is called quantum mechanics. It describes the states of electrons in an atom as 'electron clouds', so-called orbitals, which indicate the probability distribution of the electron wave function. In contrast to a naive classical picture that pictures electrons as point-like particles with given velocity and position, the quantum mechanical picture describes electrons as smeared-out matter waves following the Heisenberg uncertainty principle.
Because electrons were believed to be moving very fast that it almost can't be seen, the scientists found some places where the electrons can be seen and they called it the "electron cloud".
Nobody "invented" the electron cloud. The concept was discovered by Werner Heisenberg in 1926.
The probability of finding an electron at a given point in an atom.
J.J. Thomson
The electron was discovered by using cathode ray tubes. When it was discovered that the cathode ray diverted away from the negative end of a magnet to the positive end, it revealed that there was a negative particle present in the ray.
The Physicist, Galileo Galilei.
Electron micrograph
This particle was the electron discovered in 1897 by Joseph John Thomson.
that the more heat u have the quicker the evaporation
John Joseph Thomson (J.J. Thomson)
J.J. Thomson is credited with the discovery of the electron.
Niels Borh, a Danish scientist, discovered this in 1913
Ernest Rutherford is the name of the scientist who discovered that atoms have positively charged nuclei.
J.J. Thompson
benjamin franklin
wegener alfred
Mr Blobby
Insulation was discovered by a mad scientist. his name was Profeser poopy pants.
Theobromine was discovered in 1841 by a Russian scientist by the name of Alexander Woskresensky.
Robert Boyle
Mary Leakey