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J.J. Thompson discovered that cathode rays were made up of electrons, and determined the mass-to-charge ratio of the electrons. He found that the mass-to-charge ratio of the cathode rays was much smaller than that of hydrogen, and concluded that constituent particles (electrons) must be the building blocks of atoms. He modeled the neutral atom as a sphere of negatively charged electrons distributed amongst positively charged protons. This is known as the "plum pudding" model or the Thompson model of the electron.
Ernest Rutherford proved that the Thompson model was incorrect when he discovered that gold atoms consist of an outside layer of electrons, with a center nucleus densely packed with protons.
What else can I help you with?
Chemical reactivity of an atom is determined by?
Electron Configuration
What is the shape of an electron cloud is determined by?
The energy sublevel.
The physical size of an atom is largely determined by?
The physical size of an atom is largely determined by the size of the electron cloud.
What can the period of a element be determined by?
The period of an element in the periodic table can be determined by the number of electron shells or energy levels that the element's atoms have. Each period on the periodic table corresponds to the number of electron shells occupied by the elements within that period.
Is it true Iodine has four electron shells?
No, iodine has four electron shells, marked as "K", "L", "M", and "N". The number of electron shells is determined by the electron configuration of an element.
The understanding that the position of an electron in an electron cloud cannot precisely be determined was developed by Werner Heisenberg and is known as the?
"Uncertainty Principle". He didn't say that the position can't be precisely determined. He said that the position and the momentum can't both be precisely determined at the same time. The more precisely you determine one, the more fuzzy the other becomes at the same time.
What is the radius of the electron's spiral path?
The radius of the electron's spiral path is determined by its energy and the strength of the magnetic field it is moving through.
Why is the period of an element determined by an electron configuration?
The period of an element is determined by electronic configuration.Period is same as the number of energy levels of the element.
How are the outer electron shells determined?
http://en.wikipedia.org/wiki/Valence_shell#Valence_shells
Shapes of electron orbital are determined by what equations?
Schrodinger wave equation
How is the shape of an electron cloud determined?
The shape of an electron cloud is determined by the probability of finding an electron in a specific region around the nucleus of an atom. This probability is described by the electron's wave function, which is influenced by the atom's structure and the interactions between electrons and the nucleus. The electron cloud takes on various shapes, such as spherically symmetric for an s orbital or more complex for p, d, and f orbitals.
How can one determine the hybridization of an atom in a molecule based on its Lewis structure?
To determine the hybridization of an atom in a molecule based on its Lewis structure, count the number of electron groups around the atom. The hybridization is determined by the number of electron groups, with each group representing a bond or lone pair. The hybridization can be determined using the following guidelines: 2 electron groups: sp hybridization 3 electron groups: sp2 hybridization 4 electron groups: sp3 hybridization 5 electron groups: sp3d hybridization 6 electron groups: sp3d2 hybridization
