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Write one use of cathode ray tube.
Draw a diagram of a simple atom showing the nucleus and electrons. In this atom:
(a) What type of charge will there be on the nucleus?
(b) What is the value of this charge?
How is a cathode ray beam affected while passing through a magnetic field?
State any two uses of cathode rays.
A certain nucleus has a mass number 20 and atomic number 9. Find the number of neutrons and protons present in it.
Justify with reason, whether the following nuclear reactions are allowed or not.
\[\ce{^A_Z X -> ^A_{Z - 2}X + ^4_{2}He}\]
Which part of the atom undergoes a change in the process of radioactive decay?
Explain, why radium paint, consisting of zinc sulphide and a trace of radium salt, glows in the dark?
State one use of radio-isotopes.
Which of the following statements is/are correct?
- α particles are photons
- Penetrating power of γ radiation is very low
- Ionization power is maximum for α rays
- Penetrating power of γ radiation is very high
