Charge/ mass of newtron, electron, Proton with absolute charge and mass
Answers
Explanation:
A British Physicist named J.J Thompson in the year 1897 proposed that an atom constitutes of at least one negatively charged particle. He discovered electrons while working on an experiment. In the experiment, gas was passed at low pressure through a glass discharged tube.
Two electrodes were placed at the two opposite ends of the glass discharge tube which was further connected to high voltage supply (battery). The electrode joined to the negative end was called cathode and the electrode joined to the positive end was called anode.
Thomson observed a stream of negatively charged particles emitted from the cathode. Furthermore, the stream of particles moved towards the anode. The streams of negatively charged particles discharged from the cathode end of the discharge tube are called cathode rays. He named it as “corpuscles” which was later called “electron.”
An electron is represented by “e” and it is known to contribute to the negative charge of an atom. The absolute charge of an electron is the negative charge of 1.6×10-19 coulombs. The relative mass of an electron is 1/1836 (1/2000), thus the mass of an electron is very small and is considered as 0. Therefore, the mass of an electron is negligible and the charge of an electron is -1.
Answer:
Name Representation Absolute Charge Relative Charge Mass (Kg) Relative mass
Electron e– -1.60×10-19 C -1 9.1×10-31 kg 1/1840 (negligible)
Proton P+ 1.60×10-19 C +1 1.672×10-27 kg 1u
Neutron n 0.0 C 0 1.674×10-27 kg
1u