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

1.	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
Answer» 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. Option : (C) 18, 15, 16

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

Answer»

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.

Option : (C) 18, 15, 16