The Periodic Table

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pentavalentcarbon

14:02

@DHMO Later today, I'm busy right now.

DHMO

@pentavalentcarbon thanks

etherealflux

14:13

man, inorg is weird

everything we learned back in freshman year was a lie

chlorine can form five bonds

DHMO

@etherealflux who said it can't?

even in high school now i am being taught that chlorine can form seven bonds

by expanding octet (which is a lie but whatever)

etherealflux

hah

It's a tower of lies so that the poor mechanical engineers can survive gen chem

DHMO

lol

DHMO

14:37

Together we can make the world a better place.

Join the petition.

Aaron Abraham

15:12

That is SO old......

BTW, a little help here guys? chemistry.stackexchange.com/questions/59798/…

I'm not seeing any answers coming my way soon....

orthocresol

15:48

sorry, electrochem not quite my forte, I have given up on it...

1 hour later…

ringo

16:49

-2

A: How is NH4Cl a salt?

I'm really glad everyone is nitpicking the tiny details of this question instead of actually answering what was asked. Obviously this person isn't a chemist, and is in the basic level courses in school. Maybe focus on what's being asked instead of being pretentious. I'm sorry, I don't know the ...

...

Wildcat

lol

Especially @orthocresol is horrible nitpicking in comments. XD

Wildcat

17:06

Q: Is ozone really a chemical element?

In our chemistry book is written that ozone ($\ce{O3}$) is a chemical element. Also our chemistry book gives a definition that agrees with that. But our teacher doesn't agree. His reasons: If ozone is a chemical element why it isn't in the periodic table? It is not true with the things ...

elements

Oh, boy...

orthocresol

@Wildcat I think that is probably my highest upvoted comment.

Wildcat

@orthocresol You'd better actually answer what was asked! XD

orthocresol

@Wildcat flags own comment as not constructive

Wildcat

Too late, I'm afraid... :|

orthocresol

Actually, it seems like I have a comment with +29, but I can't find it.

The claims are not true, they are just rubbish pseudoscience misinformation. Google "reboiled water" and skip the websites that claim to be "natural" "healthy" "chemical-free" etc. Those people don't know what they're talking about but just like to fear monger. — orthocresol May 2 at 11:55

There it is.

And this has +10:

Draw the Lewis structures for $\ce{BF3}$, $\ce{NH3}$, and the adduct $\ce{F3B.NH3}$. Are you really sure boron has an expanded octet in the adduct? Are you sure that boron even has a full octet in $\ce{BF3}$? — orthocresol Nov 22 '15 at 14:50

Wildcat

17:19

@orthocresol +30 now! :)

Still no Evernote client for Linux?! Seriously?!

orthocresol

@Wildcat Here's your most upvoted comment:

Q: What is the difference between electric current and electric charge?

Are electric current and electric charge the same thing? I'm just getting back into relearning chemistry, so a more in-depth answer about how electricity works in general would be wonderful. Edit: Thank you all for clarifying that this belongs to the Physics SE. That being said, I guess this que...

electricity

I'm voting to close this question as off-topic because it belongs to Physics.SE. — Wildcat Jul 27 '15 at 9:05

Wildcat

Well, a bit unexpected. :D

orthocresol

This is joint highest:

I'm voting to close this question as off-topic because it is not related to chemistry. — Wildcat 2 days ago

We like your custom close reasons :D

Wildcat

Loong

@orthocresol I guess, my most upvoted comment is on travel.stackexchange.com with currently +88. That site is more chatty than Chemistry. ;-)

orthocresol

17:47

@Loong I can certainly imagine travellers being more chatty than chemists!

I wonder who's actually going to run for mod elections...

Wildcat

18:07

@orthocresol @Rubisco :)

orthocresol

We have two available positions though, need one more!

And hopefully >1 more.. otherwise it is not much of an election, is it :p

Wildcat

@orthocresol than reinterpret my previous message as a list of two usernames. :D

orthocresol

@Wildcat Oh no, you've noticed that I'm power-hungry

Wildcat

@orthocresol typical Russian elections. XD

orthocresol

@Wildcat ah well, my home country is not that great either :(

Noah P

18:15

Hey all

Quick question

$NH_3 + NO_2$ to $N_2 + H_2O$

Wildcat

Hi @NoahP!

Noah P

What on earth are the half equations for that?

I'm getting $NH_3 +3e^- \rightarrow N+3H^+$

And

$NO_2 + 4e^- + 4H^+ \rightarrow N+ 2H_2O$

Is that right?

Hi @Wildcat

orthocresol

1. Your $\ce{N}$ should be $\ce{1/2 N2}$.

Noah P

Okay sure

orthocresol

2. Your first equation isn't balanced in terms of charge. NH3 (-3) is being oxidised to N2 (0), right?

(oxidation state in parentheses)

Noah P

18:18

yeah

orthocresol

So, your electrons should be on the RHS.

Noah P

Hence the 3 electrons?

orthocresol

Oxidation being a loss of electrons.

Noah P

Oh sorry thats a typo

I meant -

orthocresol

Ah, ok :) Apart from that, you are all set. Those are quite correct.

Noah P

18:19

What so theres just 7 hydrogens floating around?

It just doesnt seem nice

orthocresol

You need to add the two half-equations together and cancel out the electrons.

Noah P

But those 2 half equations are right?

orthocresol

Oh, wait, this is in gas-phase, isn't it?

Noah P

Unspecified

orthocresol

Because if you simply added the half-equations together, you would obtain...

$\ce{NH3 -> 1/2 N2 + 3H+ + 3e-} \tag{1}$

$\ce{NO2 + 4H+ + 4e- -> 1/2 N2 + 2H2O} \tag{2}$

and $4 \times (1) + 3 \times (2)$ would give you:

$$\ce{4NH3 + 3NO2 -> 7/2 N2 + 6H2O}$$

Yeah, those two half-equations are right.

Noah P

18:22

Thanks man

orthocresol

Whether it's in gas phase doesn't matter :) I was thinking that the protons wouldn't be happy in gas phase, but they cancel out anyway, as they should.

Loong

18:42

@orthocresol The number of candidates on Physics was just reduced from 8 to 5: physics.stackexchange.com/election/3

1 hour later…

Loong

19:55

now down to 4 (someone withdrew)

3 hours later…

DHMO

23:14

chem.libretexts.org/Core/Physical_and_Theoretical_Chemistry/…

Can anyone tell me what the symbols mean in the first table?