J.J. Thomson's experimental model proposed the discovery of ____________.
Electron
J.J. Thomson performed the famous cathode ray tube experiment in 1897, in which he studied the deflection of cathode rays in electric and magnetic fields.
From these experiments he concluded that cathode rays consist of extremely small, negatively charged particles that are present in all atoms. He named these particles electrons and proposed the plum pudding model of the atom.
The neutron was later discovered by James Chadwick, the proton by Ernest Rutherford through his gold foil work on positive rays, and the nucleus by Rutherford's alpha scattering experiment.
Hence, the correct answer is Electron.
Similar Questions
According to Bohr’s model, electrons revolve around the nucleus in:
Two isotopes of chlorine are present in nature: chlorine-35 and chlorine-37. Which statement best explains their chemical behavior?
In Rutherford’s α-particle scattering experiment, the conclusion that most of the atom is empty space was drawn because:
Which statement about mass number is correct?
Which of the following best represents the characteristic properties of isotopes?
Which of the following correctly describes a proton?
Which of the following correctly defines the mass number of an atom?
Imagine a scientist is analyzing an unknown atom and finds it has a mass number of 24 and an atomic number of 12. If the atom gains two neutrons due to a nuclear reaction, what will be its new mass number?
Which of the following statements is/are CORRECT?
Statement I: The maximum number of electrons in any shell is given by 2n2.
Statement II: The third shell (n=3) can hold up to 12 electrons.
Which of the following statements about neutrons is correct?
Important Questions from Structure of Atom
- According to Bohr's model, electromagnetic radiations possess dual character properties behaving like:
- Which of the following is NOT an isotope of hydrogen atom?
- The atomic number of an element is equal to which of the following?
- Which of the following factors primarily determines the size of an atom?
- The atomic radius of hydrogen atom is
