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प्रश्न
If A is a radioactive element which emits an α - particle and produces 104Rf 259. Write the atomic number and mass number of the element A
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उत्तर
In α decay
zXA `"αdecay"/263` x z - 2YA-4 + 2He4 ( α decay)
106x263 α decay 104 Rf259 + 2He4
In element A having atomic number is 106 and the mass number is 263.
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संबंधित प्रश्न
Artificial radioactivity was discovered by ______.
________ aprons are used to protect us from gamma radiations.
Positron is an ________.
_______ is used to measure exposure rate of radiation in humans.
The radio isotope of ________ helps to increase the productivity of crops.
Match: III
| a. | Soddy Fajan | Natural radioactivity |
| b. | Irene Curie | Displacement law |
| c. | Henry Bequerel | Mass energy equivalence |
| d. | Albert Einstein | Artificial Radioactivity |
Mark the correct choice as
- Assertion: In a β - decay, the neutron number decreases by one.
- Reason: In β - decay atomic number increases by one.
Who discovered natural radioactivity?
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