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Evgesh-ka [11]
3 years ago
6

Which of the following are pure substances? (Select all that apply.)

Chemistry
1 answer:
riadik2000 [5.3K]3 years ago
6 0
Elements and compounds are both examples of pure substances. Compounds are substances that are made up of more than one type of atom. Elements are the simplest substances made up of only one type of atom. i hope that helps:)
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3 years ago
The Lyman series results from excited state hydrogen atoms transiting to
Nutka1998 [239]

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I can't draw diagrams on this web site but I can do with numbers I think. So an electron is moved from n = 1 to n = 5. I'm assuming I've interpreted the problem correctly; if not you will need to make a correction. I'm assuming that you know the electron in the n = 1 state is the ground state so the 4th exited state moves it to the n = 5 level.

n = 5 4th excited state

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n = 3 2nd excited state

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b. The Lyman series is from whatever to n = 1. Count the above that end in n = 1.

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So for n = 5 to n = 1, use -Efor 5 -(-Efor 1) = + something which I'll leave for you. You could convert that to wavelength in meters with delta E = hc/wavelength. You might want to try it for the Balmer series (n ending in n = 2). I think the red line is about 650 nm.

Explanation:

8 0
3 years ago
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