20,345
edits
Changes
→Calculating Atomic Number
<math>Q = z\times1.60\times10^{-19}</math>C
<math>m = 231\times\1times1.67\times10^{-27}</math>kg
| style="height:20px; width:300px; text-align:left;" |'''1. State the known quantities in [[SI Unit]]s.'''
<math>S.C. = \frac{Q}{m}</math>
<math>3.82\times10^{7} = \frac{z\times1.60\times10^{-19}}{231\times\1times1.67\times10^{-27}}</math>
| style="height:20px; width:300px; text-align:left;" |'''2. [[Substitute (Maths)|Substitute]] the numbers and [[Evaluate (Maths)|evaluate]].'''
<math>S.C. = \frac{Q}{m}</math>
<math>4.35\times10^{7} = \frac{z\times1.60\times10^{-19}}{(z+30)\times\1times1.67\times10^{-27}}</math>
|-
| style="height:20px; width:300px; text-align:left;" |'''3. [[Rearrange (Maths)|Rearrange]] the equation and [[Solve (Maths)|solve]].'''
<math>z = \frac{1.4736414\times10^{-17}}{1.60\times10^{-19}}</math>
<math>z = 92.1<\/math>
The [[element]] is [[Uranium]].