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How can a flame test identify an unknown element?
A. The specific heat capacity of the element is compared with known values.
B. The emission spectrum of the element is compared with known spectra.
C. The ionization energy of the element is compared with known amounts.
D. The element's temperature of combustion is compared with other elements ​

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Answer:

The emission spectrum of the element is compared with known spectra.

A flame test identify an unknown element when The element's temperature of combustion is compared with other elements.

Hence, Option (D) is correct answer.

How to identify unknown element by using flame test ?

First take an unknown metal and put it under a flame. The scientist can identify the unknown substance by the color of flame they produce.  Different unknown elements produce different colors.

Example: The element Copper produce the blue flame, sodium produces a yellow flame.

Thus, from the above conclusion we can say that The element's temperature of combustion is compared with other elements.

Hence, Option (D) is correct answer.

Learn more about the Flame test here: https://brainly.com/question/864891

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