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प्रश्न
The subatomic particle called electron was discovered by :
पर्याय
J.J. Thomson
Neils Bohr
James Chadwick
E. Goldstein
उत्तर
J.J. Thompson
J.J. Thompson discovered electrons by conducting a cathode-ray experiment.
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संबंधित प्रश्न
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 _________
All the gases from cathode rays and anode rays when electricity is passed through them :What does the formation of cathode rays tell us about the atoms?
Write down the number of electrons in X and neutrons in Y.
An element A has 1 electron in its first shell. It combines with element B having 7 electrons in its third shell. What type of bond is formed?
Choose the correct option:
The mass number of an atom whose unipositive ion has 10 electrons and 12 neutrons is :
Choose the correct answer from A, B, C and D:
When a metal atom becomes an ion:
Name or state the following:
Ion formed by the gain of an electron(s)
Give a simple diagram to show the arrangement of the electrons in an atom of sulphur.
Write down the electronic configuration of the following
- 2713X,
- 3517Y.
Write down the number of electrons in X and neutrons in Y and the formula of the compound formed by X and Y.[XY3]
Helium has two electrons in the outermost orbit and so it is chemically inert.
