The Periodic Table

edited !

Martin - マーチン

8:24 AM

@hBy2Py Do you know if VMD can do this?

9:06 AM

question

why does metallic character decrease when we go from left to right along a period?

the answer in my notes is "as the atomic size decreases so the pull on electrons is more which doesnt facilitate easy donation"

but can it be that "there are more electrons in the left hand side so it takes more energy to donate them all"

so the atom rather choses to gain some

Q: Why is there only one vote button?

9:52 AM

@MartianCactus You can give a million reasons for why something is happening, and as long as it does not conflict with experimental data, it doesn't matter which is the correct rationalization, when scientific correctness doesn't matter.

And I've got to the realization that high school science does not care what is scientifically correct.

4

Downvoted thingy of the day

-15

Why doesn't an answer have two vote buttons, one for the effort and one for the accuracy? You know some people spend some time to answer questions and probably they answer the wrong way. So, why give them only down votes?

Martin - マーチン

10:07 AM

@M.A.R. There are multiple vote buttons on a q/a: up-vote, down-vote, close-vote, delete-vote, flag-vote, comment-vote... so much to vote from ಠ_ಠ

Q: Method to get answers accepted if OP is unregistered

-11

On many of the Stack Exchange sites, a significant proportion of questions are asked by unregistered users who are then unable to accept an answer to their question as correct. This is a massive disincentive to answering questions from unregistered users, given that the probability of reputation ...

discussion feature-request reputation accepted-answer unregistered-users

10:26 AM

@M.A.R. why shouldnt it matter which reasoning is correct and which one isnt?

@MartianCactus Because you're using vague, qualitative statements

you would end up using the incorrect reasoning in some other thing and end up regretting it wont you?

You're not calculating anything.

yes but what i was saying (there energy would be low thing) that my teacher told me in the last grade

and this she is saying now

@MartianCactus Which is usually what happens to high school students who read something more than their own textbook.

10:28 AM

so ur saying that you shouldnt study from out of your textbook?

No, I'm saying that you shouldn't take your textbook or your teacher's word as THE word.

Q: Intrinsic Reaction Coordinate - What does 'Connectivity' really mean?

oh

Bounty Hunter

3

I am currently in the process of connecting transition state (TS) structures to other minima in order to determine a reaction pathway. Now I understand the basic concepts of this method. You start with your TS, run an IRC in both the Forward and Reverse directions, then you optimize the final s...

reaction-mechanism computational-chemistry quantum-chemistry reaction-coordinate

but if textbooks are not ture then..

You should accept the fact that most of the stuff you read is for the simplest compounds.

The ones you study.

10:31 AM

isnt the entire system busted?

@MartianCactus If you're still on the pathway of chemistry, a few years later you would realize that everything you are taught is wrong.

@MartianCactus They are correct, but only in that limited subset of compounds you're supposed to study

oh..

oh

@MartianCactus No, it's not.

and what about stuff you read on net?

10:32 AM

@MartianCactus depends on the source

*stuff you read on stack exchange

or wiki

@MartianCactus those are 100% true

i'm just kidding

@MartianCactus Here, most of the stuff is correct.

I agree.

most?

10:33 AM

Especially stuff more people have come across

but you still have to be careful

i mean there IS peer reviewing

Exactly

oh yeah

For example, people would point out in the comments that atomic orbitals don't even exist.

10:33 AM

and wiki?

But people will still answer questions regarding orbitals

because they're useful

some people say a lotta stuff on wiki is not true

not because they're true

@DHMO what do you meam?

@MartianCactus chemistry.stackexchange.com/questions/tagged/orbitals

orbitals is a good approximation to what is happening inside the atom

but they don't exist

10:35 AM

oh yeah

yet we still answer questions about orbitals

we even have a tag for it

because it is useful

like i think they are a probablity of where the electron would be or something..

they don't exist.

except in hydrogen or helium ion

do electron clouds exist?

they only exist in one-electron systems

we also answer questions about bondings which also don't exist

10:36 AM

oh

so the point is

most of the stuff you are tought in school is correct to some extent..but later on you cant really use it..

and most of the stuff on stack exchange is correct

so the arguments that my teacher laid doesnt have to be correct but they are just there to help us get a hold of the subject.

some are approximations

single bonds etc. are approximations

orbitals are also approximations

or correct to some extent

in stackexchange you can find those

but approximation is not the reality

oh

orbital

is a tool

for calculating stuff

i think

yes

they only exist for one-electron systems like hydrogen, helium ion, lithium dication, etc.

10:39 AM

just like 2d graphs on which we draw different shapes and calculate their areas using the coordinates of the graph

the graph is also a tool

just like the orbital

its not really there

but we can do calculations and stuff with it

thats what i think anyway

something like that

10:53 AM

@MartianCactus you can bring concepts here to see which ones are wrong

if you are interested in disproving your textbook

Loong

11:22 AM

!!img/serotonin

@Loong Yeah, it's not that image

orthocresol

1:38 PM

!!img/5-ht

!!img/Ds substance

!!img/1-aza-3-(2-aminoethyl)-5-hydroxyindene

No result found.

orthocresol

1:45 PM

I guess nobody was interested in non-standard nomenclature.

!!img/paracetamol

Q: What kind of spells would magicians cast in combat if the fuel to magic is very expensive

oh, the "para" really means para-

I guess it is para- + acet- + am- + ol.

paracresol

2:01 PM

Who hath calleth me?

12 mins ago, by DHMO

oh, the "para" really means para-

Oh hi @DHMO o/

Senpai @Jan \o/

Now that I think about it, @M.A.R. said he'd quit changing his username every now and then...he didn't mention display photo though -_-

Not that it matters...since Trump's probably going to nuke Iran in a couple of days ._.

Jan

Hello, my dear @parasock o/

paracresol

snuggles up against @Jan's foot

20

In the story I’m working on, there is a strict ruleset on how magic works, one of the main points being it needs a “fuel” to work, and that “fuel” is VERY expensive. That being, most magicians uses their skills saving the most fuel possible. Against ordinary foes, without any magical abilities, t...

reality-check magic military tactics

18

Q: I was fingerprinted in Düsseldorf on exit. Am I under scrutiny?

I have a 1-year multiple entry Schengen visa 90/180 issued by Italy. Out of five trips, I used it twice to enter Italy. The other three times, I entered Germany but stayed once in Luxembourg and twice in Holland. I arrived and departed from Germany because the flights there were cheaper. My...

visas schengen germany borders multiple-entry

^ Ouch

Searches for posts to upvote...just happens to find some of @Jan's