MHT CET Chemistry question

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

(A)an isobar of E
(B)an isotope of ECorrect
(C)an isotone of E
(D)E itself

Answer: (B)

Solution

Loss of one lowers the atomic number by 2 and the mass number by 4, and two emissions raise the atomic number by 2, so the atomic number is unchanged while the

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Question ID VK-060491