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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.

Text Solution

Verified by Experts

Since the ion carries 3 units of positive charge, it will have 3 electrons less than the number of protons.
Let number of electrons = x
No. of protons = `x + 3`
No. of neutrons = `x + (x xx 30.4)/(100)`
`= x + 0.0304 x = 1.304 x`
Now, No. of protons + No. of neutrons = 56
`x + 3 + 1.304 x = 56`
`2.304 x = 53`
`x = 53/2.304 = 23`
No. of electrons = 23, No. of protons `= 23 + 3 = 26`
No. of neutrons `=56 - 26 = 30`
Symbol = `""_(26)^(56)Fe^(3+)`
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