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प्रश्न
What do you mean by Atomic mass
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उत्तर
Atomic mass of element is the relative mass of its atom as compared to the mass of carbon atom taken as 12.
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संबंधित प्रश्न
A nucleus `""_11^24Na` emits a beta particle to change into Magnesium (Mg)
(i) Write the symbolic equation for the process.
(ii) What are numbers 24 and 11 called?
(iii) What is the general name of `""_12^24Mg `with respect to `""_11^24Na` ?
What kind of change takes place in a nucleus when a β -particle is emitted?
Name two radioactive substances.
A radioactive substance is oxidized. What changes would you expect to take place in the nature of radioactivity? Explain your answer.
State two properties that a substance should possess when used as a thermionic emitter.
In a cathode ray tube state the purpose of the fluorescent screen.
State three ways of obtaining an electron-beam.
Heavy radioactive elements eventually turn into ______.
