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>> $A - radioactive element whose mass numbe$

Question

$A -$ radioactive element whose mass number is $218$ and atomic number is $84$ emits $$\beta -$ particle. What would be the mass number and atomic number of element after decay?

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Updated on : 2022-09-05

Solution

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$_{85} X^{218} \to_{85} Y^{218} +_{- 1} β^{0} + v$
Atomic number of produces nucleus $= 85$
Mass number $= 218$

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