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प्रश्न
The subatomic particle called electron was discovered by :
पर्याय
J.J. Thomson
Neils Bohr
James Chadwick
E. Goldstein
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उत्तर
J.J. Thompson
J.J. Thompson discovered electrons by conducting a cathode-ray experiment.
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संबंधित प्रश्न
State whether the following statement is true or false :
The cathode rays obtained from all the gases consist of negatively charged particles called electrons.
Fill in the blanks of the following statements :
An atom has atomic mass number 23 and atomic number 11. The atom has_________ electrons.
Cathode rays are a beam of fast moving _________
The maximum number of electrons that can be accommodated in L shell are_________
The maximum number of electrons that can go into the M shell is _________
What is the absolute mass and charge of an electron?
Write down the electronic configuration of the following:
(a) `""_13^27"Y"`
(b) `""_17^35"Y"`
The electronic configuration of fluoride ion is the same as that of the neon atom. What is the difference between the two?
Choose the correct answer from A, B, C and D:
When a metal atom becomes an ion:
What is the relation between the number of protons and the number of electrons in an atom?
Give a reason why noble gases have a stable electronic configuration.
Which of the following statement is always correct?
All non–metals will have ______ electrons in the outermost orbit of their atoms.
