Periodic Table

Science questions not covered in Chem 14A and 14B. Try to limit questions to chemistry (inorganic chemistry, physical chemistry, organic chemistry, biophysical chemistry, biochemistry, materials science, environmental chemistry).

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VioletKo3F
Posts: 103
Joined: Sat Sep 07, 2019 12:18 am

Periodic Table

Postby VioletKo3F » Sun Oct 06, 2019 9:01 pm

Does anyone know what the number in parenthesis next to the standard atomic weight stands for?
Ex.
H
hydrogen
1.00794(7)
What's the 7?

JohannaPerezH2F
Posts: 94
Joined: Wed Sep 18, 2019 12:18 am

Re: Periodic Table

Postby JohannaPerezH2F » Sun Oct 06, 2019 9:52 pm

I might be completely wrong so anyone correct me if I'm wrong but it might be the number of isotopes that exists?

JohannaPerezH2F
Posts: 94
Joined: Wed Sep 18, 2019 12:18 am

Re: Periodic Table

Postby JohannaPerezH2F » Sun Oct 06, 2019 9:52 pm

I might be completely wrong so anyone correct me if I'm wrong but it might be the number of isotopes that exists?

Lauren Sanchez 3D
Posts: 52
Joined: Sat Aug 24, 2019 12:17 am

Re: Periodic Table

Postby Lauren Sanchez 3D » Sun Oct 06, 2019 10:57 pm

Will we receive a periodic table to use during the tests?

Jingyao Chen 4H
Posts: 49
Joined: Fri Sep 27, 2019 12:19 am

Re: Periodic Table

Postby Jingyao Chen 4H » Thu Oct 17, 2019 10:28 am

I believe it is just the next decimal place of the molar mass. It could be that we don’t need to go that far for using molar mass, but just for your information, the next decimal place is there.

Jingyao Chen 4H
Posts: 49
Joined: Fri Sep 27, 2019 12:19 am

Re: Periodic Table

Postby Jingyao Chen 4H » Thu Oct 17, 2019 10:29 am

Yes, we will be given a periodic table and most of the formulas on tests.


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