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प्रश्न
When does the nucleus of an atom tend to become radioactive?
उत्तर
When the number of neutrons exceeds much than the number of protons in a nuclei, it become unstable or radioactive.
संबंधित प्रश्न
What are free electrons?
Why is a cathode ray tube evacuated to a low pressure?
What do you mean by Mass number.
A radioactive source emits three types of radiations. Name them.
(i) Name the radiations which are charged.
(ii) Name the radiations which are most penetrating.
(iii) Name the radiations which travel with the speed of light.
(iv) Name the radiations which have the largest mass.
A nucleus is \[\ce{^24_11 Na}\] β-radioactive.
Write the equation represent β-decay.
Define bound electrons.
Define mass number of an element.
Justify with reason, whether the following nuclear reactions are allowed or not.
\[\ce{^A_Z X -> ^A_{Z + 1}Y + ^0_{-1}β}\]
Unit of radioactivity is _______
