Question 515934
The mass of one electron is 9.11 X 10(-28) grams. A uranium atom contains 92 electrons.  Find the total mass of the electrons in a uranium atom.  
Express your answer in scientific notation.
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Use * for multiply, not x
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Mass of 92 electrons = 9.11E-28*92
= 838.12E-28
= 8.3812E-26 gms or 
{{{8.3812*10^-26}}} gms
The input data had 3 significant figures
--> {{{8.38*10^-26}}} gms
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"E format" is commonly used for scientific notation.
It's easier to type and to say.
--> 8.38E-26 gms