Number of electrons in 36mg of .8^(18)O^...

Number of electrons in 36mg of `._8^(18)O^(-2)` ions are : (Take `N_(A) = 6 xx 10^(23))`

A

`1.2 xx 10^(21)`

B

`9.6 xx 10^(21)`

C

`1.2 xx 10^(22)`

D

`1.9 xx 10^(22)`

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