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प्रश्न
What are cathode rays? How are these rays formed?
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उत्तर
Cathode rays are the beam of electrons which travel from the negatively charged end (i.e. cathode to anode) of a vacuum tube, across a voltage difference between the electrodes placed at each end.
Formation of cathode rays:
Generally gases are poor conductors of electricity. However, when a high voltage charge from an induction coil is applied to tubes filled with gases at very low pressure (0.01 mm of mercury), the gases become good conductors of electricity and begin to flow in the form of rays.
These rays are called cathode rays and they travel from the cathode towards the anode.
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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 _________
What is the nature of the charge on Cathode rays .
Which sub-atomic particle was discovered by Chadwick.
What are valence electrons?
Choose the correct option
The number of valence electrons in O2- is :
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?
Explain the following:
Atoms combine by transfer and sharing of an electron(s).
Name or state the following:
Ion formed by the gain of an electron(s)
Helium has two electrons in the outermost orbit and so it is chemically inert.
When an atom gains an electron it has more electrons and thus it carries a positive charge.
