![](https://nthumb.tpgimages.com/mid2_com_img/28103/24050/TOP22279090.jpg)
Flame test for strontium. The color of the flame is caused by electrons that have been excited to a higher energy state. When they relax they emit energy in the form of a characteristic wavelength of light. The color of the flame is different for different elements and can be used to identify unknown substances.
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Creative#:
TOP22279090
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達志影像
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RM
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