1920s
May Anne ;;; ang english chemist ..she proposed that matter is matter ..:)
The Electron Cloud Model was proposed by Erwin Schrödinger in 1926 as part of the development of quantum mechanics. It describes electrons not as discrete particles with defined orbits but rather as wave functions that exist in a three-dimensional cloud surrounding the nucleus of an atom.
Erwin Schrödinger proposed the electron cloud model in 1926 as part of the development of quantum mechanics in physics. It is a mathematical model that describes the probability of finding an electron in a particular region of space around the nucleus of an atom.
The electron cloud theory was developed in the late 1930s and early 1940s.
The atom model is called the "Bohr model," named after Niels Bohr who proposed it in 1913. This model describes the atom as a small, positively charged nucleus surrounded by negatively charged electrons in specific energy levels or orbits.
The dust cloud theory was proposed by Fred Whipple in 1950. This theory suggests that comets are made up of icy bodies surrounded by a cloud of dust and gas.
Scientist use the electron cloud model to represent an atom.In the electron cloud model, an atom has two distinct regions-the nucleus and the electron cloud.
The Rutherford model proposed that atoms have a dense nucleus surrounded by orbiting electrons. The Bohr model improved upon this by suggesting that electrons orbit the nucleus in specific energy levels or shells. The cloud model combines aspects of both, recognizing that electrons do not move in fixed orbits but exist in regions of probability called electron clouds around the nucleus.
The Bohr model of the atom was the first to propose that electrons orbit the nucleus in fixed paths or energy levels. This model was proposed by Niels Bohr in 1913, and it helped to explain the stability of atoms and the emission of specific frequencies of light.
John Dalton, I believe.
electron cloud model
The Electron Cloud model