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An ion with mass number 56 contains 3 un...

An ion with mass number `56` contains `3` units of positive charge and `30.4%` more neutrons then electrons. Assign the symbol to this ion.

A

`""_(26)^(55) Fe^(3+)`

B

`""_(26)^(57) Fe^(3+)`

C

`""_(26)^(59) Fe^(3+)`

D

`""_(26)^(56) Fe^(3+)`

Text Solution

Verified by Experts

The correct Answer is:
D
Let the number of electron in `A^(+3) =x `
`56 = x+3+1.304x`
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