1.

An element E loses one alpha and two beta-particles in three successive stages. The resulting element will be

Answer»

an ISOBAR of E
an ISOTONE of E
an ISOTOPE of E
E itself.

Solution :`""_(Z)^(A)E overset(-alpha)(rarr) ""_(Z - 2)^(A-4)X overset(-beta)(rarr)""_(Z - 1)^(A- 4)Y overset(-beta)(rarr)""_(Z)^(A-4)W`
both elements E and W have same atomic number but different MASS numbers. Hence, both are isotopes. So, the resulting element will be an isotope of E.


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