Answer:
D)The sound quality for these waves cannot be compared.
Explanation:
I've done it on e2020
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Bromine can be classified as a pure substance.
Why?
Bromine is an element with atomic number 35 on group 17 of the Periodic Table. That's the first sign that shows us that it is a pure substance.
But the fact that it has a clear and defined boiling and melting point is a sign that we are in the presence of a pure substance. Pure substances are characterized by defined boiling and melting points.
Mixtures usually have a range of temperatures in which they melt and boil.
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I don’t see what you need help with but thanks:)
The correct answer is b, 18 protons
