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प्रश्न
What do you mean by Mass number.
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उत्तर
Mass number is the sum of protons and neutrons present in the nucleus.
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संबंधित प्रश्न
State three factors on which the rate of emission of electrons from a metal surface depends
What are free electrons?
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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` ?
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(a) Medical field,
(b) Agriculture,
(c) Industries?
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What particle was emitted?
A certain nucleus has a mass number 20 and atomic number 9. Find the number of neutrons and protons present in it.
Calculate the time interval between 33% decay and 67% decay if half-life of a substance is 20 minutes.
A radioactive element is placed in an evacuated chamber. Then the rate of radioactive decay will ______.
