The 17-year-old prodigy, who was second after the short program, scored a total of 224.59 after the free skate.
Yuna Kim of South Korea settled for silver medal with 219.11 points.
Italy’s Carolina Kostner snatched bronze scoring 216.73.
WOW! Gold! Adelina Sotnikova RUS #FigureSkating #Sochi2014! She is crying! pic.twitter.com/tWm8v4FOnD
— Sochi 2014 (@Sochi2014) February 20, 2014
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