No of moles = given mass ÷ molecular mass
n = 55.98 ÷ (12+19×2+35.5×2)
A binary ionic compound is composed of ions of two different elements - one of which is a metal, and the other a nonmetal.
I believe the answer is C, n = 3, l = 3, m = 3. The magnetic quantum number, or
<span>ml</span>, can only take values that range from <span>−l</span> to <span>+l</span>, as you can see in the table above.
For option C), the angular momentum quantum number of equal to ++2<span>, which means that <span>ml</span> can have a maximum value of </span>+2<span>. Since it is given as having a value of </span>+3**, this set of quantum numbers is not a valid one.
The other three sets are valid and can correctly describe an electron.