Table of Contents
Who discovered that electrons travel in shells?
Bohr
Atomic model Bohr was the first to discover that electrons travel in separate orbits around the nucleus and that the number of electrons in the outer orbit determines the properties of an element. The chemical element bohrium (Bh), No. 107 on the periodic table of elements, is named for him.
Which scientist said that electrons travel in neat circular paths called shells or orbitals?
Bohr proposed that an electron is found only in specific circular path, or orbits, around the nucleus.
What is JJ Thomson experiment?
J.J. Thomson’s experiments with cathode ray tubes showed that all atoms contain tiny negatively charged subatomic particles or electrons. Thomson proposed the plum pudding model of the atom, which had negatively-charged electrons embedded within a positively-charged “soup.”
Who said electrons travel in paths called energy levels?
Scientist who contributed to the modern atomic theory.
| Question | Answer |
|---|---|
| Electrons travel in certain paths, or energy levels. | Bohr |
| Electrons can jump from a path in one level to a path in another. | Bohr |
| Electrons are found in electron clouds, not paths. | Schrodinger and Heisenberg |
| Electrons paths cannot be predicted. | Schrodinger |
Who discovered electron proton and neutron?
Discovery of Electrons, Protons and Neutrons
| Discoverer | Year of Discovery | |
|---|---|---|
| Proton | E. Rutherford | 1909 |
| Neutron | James Chadwick | 1932 |
| Electron | J.J. Thomson | 1897 |
Which scientist believed electrons surround the nucleus?
To overcome this difficulty, Niels Bohr proposed, in 1913, what is now called the Bohr model of the atom. He suggested that electrons could only have certain classical motions: Electrons in atoms orbit the nucleus.
Who suggested that atoms travel around the nucleus of an atom in orbits or definite paths?
In the Bohr model of the atom, electrons travel in defined circular orbits around the nucleus. The orbits are labeled by an integer, the quantum number n. Electrons can jump from one orbit to another by emitting or absorbing energy.