Answer: D:wavelenght
Explanation: Students will understand that shorter wavelengths have higher frequency and energy.
It's a cyclohexane ring with an ethyl group at 1 and a methyl group at 3. The Ethyl group is bigger and more important group get's the first position.
1-ethyl-3-methylcyclohexane
Explanation:
A matchstick has a lot of chemical energy stored in it. When the match is struck, it burns and the chemical energy in it produces heat energy and light energy.
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15 is the group that phosphorus is found in.