The Periodic Table

Melanie Shebel

00:42

When I go to flag a question as off-topic (belongs on other stack exchange site), the only option given is Meta. And I can't report it until I select a stack exchange subsite. Is there a reason this is happening?

Mithoron

00:52

@MelanieShebel It's constructed this way. Seems it should be closed normally. Eventually mod can do it if he wants

IͶΔ

11:35

@MelanieShebel If you want a question migrated, you should custom-flag (i.e. "flag for moderator attention").

Even users with close vote privileges like me have to do that to migrate questions.

We don't see any other sites in "belongs on other SE site" because we don't have something named migration path to any other SE sites.

Migration paths are proposed on per site meta, and then implemented by SE devs if they're thought to be useful.

Right now, I don't think migration paths to any SE are useful, since it's not like we get many off-topic-here-but-perfectly-valid-question-on-another-SE-site questions.

One important thing to note not to get your flag declined, @Melanie, is that migration is only for questions that have a high quality, but are not about chemistry.

Ask yourself:

> Will people on site X like the question we're throwing at them?

If the answer is no or even partially, we shouldn't migrate.

Also, welcome (back) to the table, @Mela!

IͶΔ

12:15

I have reviewed 666 VLQ posts. -__-

user116211

12:29

@IͶΔ I've 831 in my pocket :P

user116211

Number of the Beast

The Number of the Beast (Greek: Ἀριθμὸς τοῦ θηρίου, Arithmos tou Thēriou) is a term in the Book of Revelation, of the New Testament, that is associated with the Beast of Revelation in chapter 13. In most manuscripts of the New Testament and in English translations of the Bible, the number of the beast is 666. In critical editions of the Greek text, such as the Novum Testamentum Graece, it is noted that 616 is a variant. == Revelation 13:18Edit == === 666Edit === The Number of the beast is described in the passage of Revelation 13:15–18. The actual number is only mentioned once, in verse...

Simon-Nail-It

13:31

Hi@tschoppi

tschoppi

Heyho

user116211

13:57

Can anyone tell me why does increasing partial pressure means the substance is chemically more active?

user116211

Peter Atkins in his book says the greater the partial pressure, greater is the chemical punch.

user116211

Can anyone tell me how?

pH13

do you know what pressure is?

Simon-Nail-It

I think this is related to collision theory

user116211

@pH13 average kinetic energy...

user116211

14:03

oh! more KE, more collision.

user116211

But greater partial pressure would mean greater partial Gibbs free energy ;(

Simon-Nail-It

14:18

Our syllabus didn't cover much about Gibbs free energy, so i don't know. And are you refer ing this reaction as a revisible reaction?

user116211

@Simon-Nail-It the discussion was in general

Simon-Nail-It

ok

tschoppi

15:17

@user36790 Maybe related to Le Chatelier? The higher the partial pressure, the higher the likelihood that it reacts towards something else

user116211

@tschoppi He didn't reach Le Chatelier by then.

user116211

why do the oxidising property increases from $\ce{S-O_2}$ to $\ce{Te-O_2}$?

orthocresol

17:08

ugh, someone spilt a large amount of morpholine in the lab today..

can't get the smell out of my head

IͶΔ

18:55

@user36790 That's why I said what I said.

user116211

19:13

@IͶΔ o.o

IͶΔ

@Mart @pH13 German proverbs are awesome.

blog.ted.com/40-idioms-that-cant-be-translated-literally

user116211

@IͶΔ Are you German?

IͶΔ

Nope.

I'm Iranian.

user116211

@IͶΔ WoW!!

user116211

@IͶΔ I never did talk with people from those countries....

IͶΔ

19:16

You just have.

> Literal translation: “To blow little ducks.”
What it means: “It means to talk nonsense or to lie.”

user116211

@IͶΔ Yeh! You are the first and I'm fortunate for talking with you :)

user116211

@IͶΔ: Are you in your doc?

IͶΔ

What? No haha

user116211

@IͶΔ Ever visited India?

IͶΔ

Nope. I might in the future.

user116211

19:20

@IͶΔ thumbs up!

IͶΔ

Though I'm not really foreseeing a traveler future for myself. If I do travel, I'm first gonna meet Japan or Korea, then China, then Switzerland, then India, then check if I'm still alive.

user116211

@IͶΔ :D

user116211

I am an armchair person type but still I wanna travel to unknown lands.

user116211

First wish would be Ireland- the most beautiful place and full of Old Saxonic era castles.

user116211

@IͶΔ Not North Korea, I suppose ;P

user116211

19:27

user116211

IͶΔ

@user36790 If I ever needed to get rid of my life as an steric hindrance in my reaction, then I'd go there.

> The idiom: Z choinki się urwałaś?
Literal translation: “Did you fall from a Christmas tree?”
What it means: “You are not well informed, and it shows.”

@Mith I am totally going to use that idiom from now on.

> The idiom: 猫をかぶる
Literal translation: “To wear a cat on one’s head.”
What it means: “You’re hiding your claws and pretending to be a nice, harmless person.”

The idiom: 猫の手も借りたい
Literal translation: “Willing to borrow a cat’s paws.”*
What it means: “You’re so busy that you’re willing to take help from anyone.”

The idiom: 猫の額
Literal translation: “Cat’s forehead.”
What it means: “A tiny space. Often, you use it when you’re speaking humbly about land that you own.”

The idiom: 猫舌
Literal translation: “Cat tongue.”

@Mart what part of the cat do you refer to in your Japanese proverbs?

user116211

@IͶΔ: what are you doing now? Means grad, or post doc?

IͶΔ

Ahem, I'm a humble guy with a PhD in lolic chemistry. — IͶΔ Jun 24 '15 at 13:25

user116211

@IͶΔ You are really humble :)

IͶΔ

19:42

Jokes aside, I'm just 17 and stuck in high school.

user116211

@IͶΔ wtf!!

user116211

I'm 18 ;/

user116211

Still trapped in high school ;P

user116211

@IͶΔ: Good night, it's 2 AM; I've to go. Bye ;)

IͶΔ

Night!

WDUK

20:03

Can some one explain this: "COF2 has one C=O bond and two C−F bonds "

i don't see how it has a C-F bond but not a O-F ?

IͶΔ

An O-F bond is very, very rare.

The only instance I know of is OF2.

And a bunch of others actually.

Like HOF.

Mithoron

@IͶΔ o/

WDUK

although rare how do i know this as a newbie :P there must be a way to determine it ?

IͶΔ

\o

Mithoron

@IͶΔ Nice choice :D

IͶΔ

20:06

@WDUK Kinda. Have you studied electronegativity?

WDUK

no

IͶΔ

Well then.

Just know that for now.

Next avatar is coming @Mith, and it's gonna be inorganic. Although not boring at all.

WDUK

although i should just know it. the question seems to imply i should have spotted it

IͶΔ

I don't see how that should be the case since I think a preliminary for drawing Lewis structures is being introduced to the concept of electronegativity.

WDUK

well we have done lewis structures

ill draw one maybe itll make sense to me when i try fill their shells

IͶΔ

20:10

Well, then you should have known that it's much, much more common and probable for C to be the central atom rather than O. And heck, where can an F be a central atom?

WDUK

well OF2 would work, but why wouldn't then carbon also join with oxygen so you have a C-O and O-F O-F

IͶΔ

That wouldn't just work. Lemme explain.

WDUK

Okay

explain like i am an idiot though :P

IͶΔ

F, O and N are proficient robbers.

WDUK

because they want to fill their shell not empty it ?

IͶΔ

20:20

Yes, and they want that a lot.

Cl is the fourth proficient robber in the scale.

WDUK

okay

IͶΔ

These guys are very smart, so they rarely steal from each other.

They rather steal from other atpms, especially if those other atoms would love to get robbed.

So O and F are in a molecule, and they're very smart. They don't steal from each other. Instead, they steal from the poor gullible carbon.

WDUK

like lithium?

IͶΔ

@WDUK Like group 1 and two, most of the times group 3, and C and Si.

WDUK

would they not bond with lithium because it only has 2s^1 to give away?

and they need more than one

IͶΔ

20:23

This, @WDUK, will instead be properly explained by chemists as "O and F are very electronegative and they prefer partial negative charges. They rather attain that from the uninterested carbon rather than fight for the electrons themselves."

Oh OK, it again went fiction-y.

@WDUK They would, but was there any lithium in your molecule?

WDUK

no i just asked that because i know its an element that would happily get rid of electrons

IͶΔ

So basically, the smart-ass-ness is called "electronegativity" @WDUK.

WDUK

i see

IͶΔ

These things you say: "Would love to get rid of the electrons"

They quantify it with different scales, and call it electronegativity.

The most electronegative atom (ignoring noble gases) is F.

Then O, then N, then Cl.

WDUK

electronegative is those who want electrons not those who want to rid of them ?

IͶΔ

20:26

Generally, electronegativity increases as you go to top right corner.

@WDUK Yes.

WDUK

top right ?

not including the final column ?

IͶΔ

So Caesium has the least electronegativity (Francium is ignored since it's electronegative and almost non-existent)

@WDUK Yes. In high school noble gases aren't meant to react. :)

WDUK

yeh got that

as a british person pretty sure theres a job about nobility :P

a joke*

IͶΔ

Didn't miss

WDUK

noble people don't interact with common folk

IͶΔ

20:28

I am noble and I'm still talking in this chat.

WDUK

its an easy way to remember what noble gas does though!

IͶΔ

It boasts.

Mithoron

@IͶΔ And there's lots of noble gas compounds :)

IͶΔ

Like ಠ_ಠ

I just changed the profile pic.

@Mith what do you think of the new one?

WDUK

if i calculate the total molar bond enthalpy for reactants. in an internal energy graph is the energy barrier simply the stage before energy added exceeds the enthalpy number

Mithoron

20:40

@IͶΔ Interesting :)

IͶΔ

onlinelibrary.wiley.com/doi/10.1002/anie.198403171/abstract

@WDUK What? O_o

Mithoron

Big ions of elements are generally cool imo

IͶΔ

Esp. boron.

I never knew phosphorus is this cool too.

I thought the best it can come up with is P4O6.

WDUK

well for a reaction to occur i have to reach the intervening stage to overcome energy barrier, i assume this barrier would be basically the moler bond enthalpy of the reactants

so any energy added above that will cause the reaction to occur

IͶΔ

That's more or less true.

Mithoron

20:44

@IͶΔ Cations of nonmetals are even more surprising

@WDUK Don't add too much :D

WDUK

why not ?

IͶΔ

@Mithoron What if we talk of Na- in a pressure of megapascals?

Mithoron

@WDUK Too much and they'll bounce off

WDUK

ah i see

Mithoron

@IͶΔ You can get Na- in room temp in solution

IͶΔ

20:47

In an alloy with K?

15 first post reviews today. (/¯◡ ‿ ◡)/¯ ~ ┻━┻ ᕙ(⇀‸↼‶)ᕗ

Mithoron

Alkalide

An alkalide is a chemical compound in which alkali metals are anions (that is, they bear a negative charge). Such species are notable because alkali metals were previously thought to appear in salts only as cations. Alkalide compounds have also been synthesized containing a cation of the alkaline earth metal barium. == "Normal" chemistry: the case of Na+ == Alkali metals are well known to form salts. Table salt, or sodium chloride Na+Cl−, illustrates the usual role of an alkali metal such as sodium: its positive charge is balanced by a negatively charged ion in the empirical formula for this ionic...

IͶΔ

Na+Na- is very boring.

HNa could do better.

I was talking of KNa.

And NaCl3. :P

15

Q: Why is NaCl3 possible?

There. And there. Almost a year ago, a group of scientists claimed to have reached compounds of $\ce{Na}$ and $\ce{Cl}$ with weird stochiometries ($\ce{NaCl3, Na3Cl, NaCl7, Na3Cl2}$ and $\ce{Na2Cl}$). What one of the articles says: These compounds are thermodynamically stable and, once made,...

Na2Cl is much cooler.

Mithoron

Polyiodide

The polyiodides are a class of polyhalogen anions composed of entirely iodine atoms. The most common and simplest member is the triiodide ion, I3−. Other known, larger polyiodides include [I4]2−, [I5]−, [I7]−, [I8]2−, [I9]−, [I10]2−, [I10]4−, [I11]3−, [I12]2−, [I13]3−, [I16]2−, [I22]4−, [I26]3−, [I26]4−, [I28]4− and [I29]3−. == Preparation == The polyiodides can be made by addition of stoichiometric amounts of I2 to solutions containing I− and I3−, with the presence of large counter-cations to stabilize them. For example, KI3•H2O can be crystallized from a saturated solution of KI when a ...

These guys are nice but analogous cations are better

IͶΔ

HOLY SHIT THIS IS AWESOME

Mithoron

@IͶΔ Indeed :D

IͶΔ

21:01

Man, chemistry is awesome.

Mithoron

Pity not many people know how awesome it can be

This whole article is great en.wikipedia.org/wiki/Polyhalogen_ions

IͶΔ

Yeah I saw it a while ago.

Mithoron

@IͶΔ But still made your jaw drop with this iodide :)

pH13

@IͶΔ yes, they are great

IͶΔ

@pH13 \o

@Mithoron It didn't drop, it made me shout.

pH13

21:11

o/

Mithoron

Bwahaha :D

@pH13 0/

IͶΔ

Buy guys, AFK for tonight.

Mithoron

@IͶΔ Bye

Mithoron

21:36

@pH13 Something for you

@pH13 onlinelibrary.wiley.com/store/10.1002/zaac.201204003/asset/…

pH13

browser say's: forbidden

is it about the figure itself or about the paper?

Mithoron

@pH13 Ooo, and it doesn't onebox :(

nice cluster

pH13

is it in a paper? do you have the doi?

Mithoron

onlinelibrary.wiley.com/doi/10.1002/zaac.201204003/full

pH13

fancy

Mithoron

21:46

This looks not bad for a thesis diva-portal.org/smash/get/diva2:7781/FULLTEXT01.pdf

pH13

my starting quote is better

hehe

Mithoron

22:16

pubs.acs.org/doi/abs/10.1021/ja025655%2B

@Loong Seen your lotr question on Sci-fi.SE, nice!

Loong

@Mithoron :-)

Nova

23:54

Hey guys, can anyone answer this question?

0

Q: How to calculate theoretical yield if there are minor products?

Calculating theoretical yield for a reaction with a single product is pretty trivial: Multiply the amount of moles of limiting reagent to the molar ratio of the limiting reagent and product to the molecular weight of the product. However, if the reaction is also capable of producing side product...

organic-chemistry experimental-chemistry

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