Question

Calculate the number of electrons protons and neutrons in 1 mole of 16o-2 ions

Answer 1

total number of electrons in o^-2 ion is 10
proton number is 8
neutron number is 2
then for 16 ions electrons is 160
protons is 128
neutron number is 32

Answer 2

Answer : The number of electrons, protons and neutrons are $6.022\times 10^{24},48.176\times 10^{23}and48.176\times 10^{23}$ respectively.

Solution :

The atomic mass of oxygen = 16

Atomic number of oxygen = 8

As we know,

Atomic number = Number of proton

Number of neutron = Atomic mass - atomic number

So, The number of proton = 8

The number of neutron = 16 - 8 = 8

Now, we have to calculate the number of electrons in $O^{-2}$ ions.

The number of electrons present in 1 molecule of $O^{-2}$ ions = 8 + 2 = 10

As, 1 mole contains $6.022\times 10^{23}$ molecule.

So, the number of electrons in 1 mole of $O^{-2}$ = $(6.022\times 10^{23})\times 10=6.022\times 10^{24}$

The number of protons in 1 mole of $O^{-2}$ = $(6.022\times 10^{23})\times 8=48.176\times 10^{23}$

The number of neutrons in 1 mole of $O^{-2}$ = $(6.022\times 10^{23})\times 8=48.176\times 10^{23}$