The number of electrons, protons and neutrons in ^(31)P^(3-) ion is respectively ……………

Monjur Alahi

The number of electrons, protons and neutrons in 31P3- ion is respectively ……………

(A) 15, 15, 16 

(B) 15, 16, 15 

(C) 18, 15, 16 

(D) 15, 16, 18


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Salim Ahmed Kawsar

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Correct Option is : (C) 18, 15, 16

Atomic Number = Number of Protons

Mass Number = Number of Protons + Number of Neutrons

Number of Electron = Atomic Number -(Number of Charges)

Therefore,

Number of Protons = 15

Number of Neutrons = 31 - 15 = 16

Number of Electrons = 15 - (-3) = 15 + 3 = 18

Hence , \(^{31} p^{3-} \) contains , 18 electrons , 15 protons and 16 neutrons.

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Salim Ahmed Kawsar

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Option : (C) 18, 15, 16

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