Talk:Chemistry/Draft

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Revision as of 10:56, 22 December 2006 by William Weaver (Talk | contribs) (Dictionary First: Chemistry and Physics)

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I changed some words again to what I think is clearer: affinity is 18th century, oxygen is Capital O , not zero, and apparently the familiar html markup works. But I only got to the first paragraph, and i still think it sounds clunky. DavidGoodman 21:42, 2 November 2006 (CST)

yes, still needs lots more work, but it's getting better.Nancy Sculerati MD 23:12, 2 November 2006 (CST)

molecules

In the first para, is it intended to differentiate molecules from crystals and metals? Probably it is to early in the article to do that clearly. DavidGoodman 23:11, 5 November 2006 (CST)

That's something that I did not change from the original WP article (the inclusion of the word metal). I like waht you are doing and I think you should go ahead and change it to read better. Your work helps so much! I've been doing more on Medicine, because of slow and absent saves on the pilot, I've been working on a word document and will get it in sometime over the next day. I had a concussion in a car accident and so am not as speedy as I would like to be. Regards, Nancy Sculerati MD 10:27, 6 November 2006 (CST)

Now that more editors and writers are on board, the few of us at the first won't have to cover quite so much territory--I hope. All of us wanted to get as many articles as possible started, but I don't think I will be able to finish all I've started. I thought I would be using word, but Firefox 2.0 has an excellent very fast spelling checker Hope you're better. You might want to start the article for it.:) DavidGoodman 20:54, 6 November 2006 (CST)

Introduction

Taking the lead from the Biology article, "Biology is the science of life." I would like to suggest this article could be structured around the opening statement of "Chemistry is the science of material."

This follows from the Systems Theory model of the universe wherein components are linked by the flow of three (3) fundamental items:

  • Energy (Physics)
  • Information (Computer Science)
  • Material (Chemistry)

On the map of General Systems Theory (GST), Biology is the next step in system complexity having components capable of accepting and delivering energy, information and material in a self-maintaining open system of the cell (the fundamental unit of life). The current introduction of the Chemistry article jumps directly into models of atoms and molecules on the pico- and atto-size scale. While I agree an understanding of what is happening at the "small" is necessary, these modules are only tools for plying the science of materials.

When I introduce "chemistry" to my university students by asking them to find a chemical in the room, they start hunting for a hidden beaker or test tube of colored liquid. The concept of "material" liberates them from thinking chemistry is only about the "small" and moves their concept of chemistry out of the laboratory. Your thoughts? --William Weaver 06:25, 18 December 2006 (CST)

I like that a lot. After all, it is both true (if not totally conventional) and makes the basic concepts of chemistry more accessible.Nancy Sculerati MD

The addition there of "interacting" should be considered: Chemistry is the "science of interacting material". Seems somewhat more appropriate as chemists dio not care about non-reacting agents :) Besides concurring with the definition that chemistry studies the INTERACTION between atoms and molecules it seems a very true notion. Robert Tito

opening statement

"Chemistry is the science of interactions of electrons of materials." Robert Tito

That change does not make sense to anyone who doen't already understand chemistry. I put it back the other way. Nancy Sculerati MD

I disagree here, what makes chemistry differ from physics is the basic interactions of electrons of atoms/molecules or generic material. If you forget the elementary electrons the basics of chemistry is harmed and the difference between physics and chemistry becomes more vague. Mentioning electrons at the core of chemistry makes it different from physics because there generally matter interacts, not only electrons. And yes maybe knowledge of electrons makes one bias, but forgetting the fundamentals makes one ignorant about chemistry as opposed to physics. That in my opinion is a bad beginning. Robert Tito I just have learned that two beams of protons moving at high speed and interacting upon collision belongs to chemistry and not to physics Robert Tito I stress out I do disagree with some of the latest additions as they are not correct in displaying the science of chemistry and its fundings. Dr. Robert Tito

Robert, I can appreciate your concern about the differences between Chemistry and Physics. As an Analytical Chemist, with specialization in spectroscopy, I'm often confused for a Physical Chemist and I don't seek to separate the disciplines of physics and chemistry. Chemistry is built with physics as a foundation, so it is impossible and not even desirable to separate the two. In my undergraduate program, I teach courses in all three disciplines of Physics, Chemistry and Computer Science and I admit and rely on my bias for General Systems Theory. When my students think of Physics, they think of the progression of:

  • position
  • displacement (delta position)
  • time
  • time displacement (delta time)
  • velocity = displacement/delta time
  • acceleration = velocity/delta time
  • mass (the concept from chemistry of material)
  • momentum = mass * velocity
  • Force = mass * acceleration
  • Work = Force * distance (displacement if conservative force)
  • delta Energy = Work
  • Energy = Kinetic (motion), Potential (position in field), Potential (mechanical, springs), Potential (chemical, bonds), Electromagnetic
  • Thermodynamics = Work as function of the system variables of Pressure (Force/area), Volume (displacement^3) and Temperature (kinetic energy)

This larger view of Physics, including the mathematics of differential and integral calculus, vectors, dot products and cross products does not include a discussion of electrons. I don't share your view that Physics and Chemistry only differ by the basic interactions between electrons and atoms/molecules. I would value your thoughts. =] --William Weaver 20:38, 18 December 2006 (CST)

After being introduced to both physics and chemistry, and having - even just elementary knowledge of both sciences, it is perfectly ok to let kids know the distinction between chemistry and physics isn't always clear. BUT as a starting remark about what chemistry is for first timers I opt for the didactic model of restriction: seperate both sciences and explain both as "separate science". Then when the need becomes clear - and at that stage the understanding of those you are teaching 'your' science one cannot go without the other. I do think however many organic chemist will not agree but as physical chemist I know it to be true. So pure fundamentally where chemistry is the interaction of matter due to the interactions of their electrons, physics is the interaction of matter without just these electrons. Here you created a clear separation. When the foundation is clear also conceptually it is possible to show similarities and overlaps. Even when describing thermodynamics it is getting hard not to use physics, mathematics being the aid-science for all beta-sciences or nature sciences (or what name you give them) (Being Dutch sometimes your terminology is strange. But as a lector as well as a teacher I started small and extended knowledge only after the basics were assimilated by the students. [The difference in educational systems is profound so it makes no sense to indicate levels under pregraduates, where - correct me if wrong - graduates are starting at the university and these should or can end with their masters.] I teach to all of university and pre-university the top-levels (chemistry - biochemistry and computer science).

Let me know your thoughts about this

Robert Tito

I loved the ideas in I learned in chemistry, and I loved the labs and I would love this article to convey some of what chemistry is to a person who really does not know. Of course the article aslo has to be true to you experts, but that is not it's purpose here , is it? Not to exactly define chemistry to an expert but to acurately introduce it to a novice. Imagine a very smart person who speaks excellent English but, for what ever reason, never went to school. Never took even a high school science course. Can you use words and pictures to give them the ideas that make chemistry so exciting and important? I say it's ok to use words like atom and molecule and elements - as long as you expalin them somewhere in an early section. But to assume that the phrase "the First Law of Thermodynamics" explains anything to this person who is reading the citizendium article on Chemistry because he's always wanted to know, really, what Chemistry is, is a problem. Same story with the electrons, outside of the question of the fundamental importance of electrostatic forces in chemical bonds, and just where that comes into defining Chemistry, it's a word (electrons) that does not mean anything much to a person who does not already know what chemistry is, and so these concepts have to be explained in plain language. Can you do better? (it ain't easy - but it's worth it!) Nancy Sculerati MD

it is not if I can do better but if WE can do better. Anyone able to speak perfect english in your anology must have had education and up to a certain abstraction level, so that argument really isn't valid.

My problem with your introduction is it states physics = chemistry because both tell the story of interacting substances. Now you have created a problem because when the two sciences describe the same why create two sciences, one would suffice. Pupils in my country are not introduced to the basics of chemistry untill age 14/15 (third year secondary school) where they do have had physics and mathematics when they entered that school. Taken that into account and assuming people without any knowledge are unlikely equipped to use a computer let alone come up with the terms for either physics or chemistry it seams clear the difference between these two sciences can be put forward and laid down as being basically whether electrons are involved or not. I fail to see where the situation in your country, china russia or any other country would lead to any other opinion. Assuming uneducated people would use a computer to start browsing for rocket science knowledge basiccaly assumes they have KNOWLEDGE of that else they were incapable of looking for exactly that topic. The point here to make is what level DO we want to tell our story? Because it is a fascinating story one with many stimulating parts and details. To catch the attention of anybody would be nice but I wonder at what level any abstract science such as either physics, mathematics or chemistry can be taught other than that the readers should have a psychological ripeness to be able to think abstract. In general that is 14+, and these persons do know about electrons, atoms and protons. They might not know details but they know of their existence. Build upon what you can assume to be a basic building block and construct the house that is called science upon that. Lets build this together but let it be the true story

Robert Tito

As another opinion, I think using a scientific definition not suitable for this general article. It is indeed hard to make exact distinctions--consider the very real distinction been Chemical physics, and Physical chemistry,which I understood as the distinction between the quantum mechanics of molecules, and the physical behavior of different substances. (but note the change of title for the journal, "Physical Chemistry Chemical Physics" and the Journal of Chemical Physics' self-definition at [1]) The same is true in the other direction--biochemistry, as possibly differentiated from chemical biology , which to me means the chemistry of natural compounds) Or even worse, Biophysics. As for chemistry dealing with the ehavior of electrons, cond=sider the field of nuclear chemistry.

the operational definition is what chemists, or physicists, or biochemists do, but there are quite a lot of people with joint appointments and where anyone stands seems determined by which department hired him first. The alternative is what chemistry courses typically teach, as distinct from physics courses. Warren, you may from necessity teach calculus, but that does not make calculus part of physics. In the other direction, mathematics departments have been known to consider classical mechanics as part of their subject, and that is where the Library of Congress puts it.

The concept we are getting at is of course known as the hierarchy of the sciences, which deserves an article of its own.

But we still need to write an article about chemistry. And saying "chemistry is the science of materials" ignores the distinction between it and materials science.DavidGoodman 23:29, 19 December 2006 (CST)

what it takes to major in chemistry, etc

since many high schoolers may look at this subpage website, it might be nice to give them suggestions on how to major in chemistry in college and the possible career options that exist with a BS, and with a PhD. Also, possible classes that many universities require for chemistry major would be nice. -Tom Kelly (Talk) 03:51, 19 December 2006 (CST)

This seems a nice addition yes. Maybe even a primary school addition would be appropriate. The first being somewhat more into the science the latter more into the phenomenology. Compare to the cooking experience and the chemistry of cooking. Using that approach might make chemistry more comprehensible and approachable for those without abstract thinking capabiliies and/or knowledge of abstract science. A problem however in the first target is the extreme detail into which research has grown into, so while remaining to present a helicopter view it needs to contain something like pinpointing inte details that might sparkle interest and curiosity. Cassiopeia 11:14, 19 December 2006 (CST)Robert Tito

The career aspects would often be covered by such an article as "Chemist" , and other aspects as "Chemical Education" DavidGoodman 23:30, 19 December 2006 (CST)

SO far all good points but how to incorporate all views and all visions, as one is regarded as shallow and the other as too scientific, either we integrate or dessegrate: science being the science, popular chit chat being the ""shallower approach"" (no pun intended) For all visions pro and contra can be mentioned, now to do what chemists major in: synthesis.

Robert Tito~


They have childrens enclycopedias... why can't we have children wikis linked for topics that could put in children's encyclopedias similar to how we have links in approved articles to draft pages. Also, if this happened, we could make a "children's wiki" search engine - giving articles appropriate to children of specified age ranges. this might be biting off more than we can chew... however, with everyone in the world editing, who knows? -Tom Kelly (Talk) 21:03, 20 December 2006 (CST)

Great to see activity here--I was afraid we'd only see articles about biology and health sciences! --Larry Sanger 21:17, 20 December 2006 (CST)

Dictionary First

I second Larry's comment... I'm delighted by this discussion.

In order to construct an encyclopedia entry for Chemistry through the collaborative efforts of multinational experts, may I suggest we may wish to focus on a common definition of the science before we embark on detail.

I am quite taken by the first statement of the Biology article "Biology is the science of life." After that common mission statement, the rest of the article flows rather nicely. I don't know what the Chemistry mission statement should say, but I hope that it would be both simple and correct.

If I may use a parable, I compare our current discussion to my own introduction to the aviation industry. While at my first aerospace meeting attended by several hundred engineers, I received the following introduction to the industry:

  • The most important concept is lift
  • It's all about propulsion
  • If you don't have modern avionics, you get nowhere
  • Planes wouldn't last long without traffic controllers on the ground
  • It all begins with the proper metal alloys
  • A plane is just an engine container
  • You have to know your mission before selecting the aircraft
  • The secret is Computational Fluid Dynamics
  • A trained pilot is the most important component

While every engineer had their own viewpoint, I was swamped by random (yet important and true) details. I finally met up with a grizzled, retired expert who stated "The aviation industry is a method of transportation." Each contribution I made to every project from then on was consistent with that foundational statement.

Can we hammer out a simple mission statement for the science of Chemistry? --William Weaver 21:59, 21 December 2006 (CST)

that shouldn't be hard because chemistry is the science of (interacting) matter

Now thats filled the details (and yes I will stipulate electrons :) ) [physics might go by the phrase: **** is the science of matter and it's interactions]

The idea of the chemistry for kids wiki is appealing - but count me out there it is not without reasons chemistry is taught in my country after student reach ±15. Teaching I can but not to primary school kids.

Robert Tito

Yes, do explain the difference between chemistry and physics. Isn't it the case that chemistry concerns everything from atoms up to complex compounds and their interactions? Maybe I'm really just confused about the difference between Nuclear Chemistry and Nuclear Physics, not that I claim to understand much either one of them. --Larry Sanger 23:48, 21 December 2006 (CST)

Yes, but when those complex compounds are traveling east at 55 mph from Pittsburgh, and another set of complex compounds is traveling west at 65 mph from Philadelphia and they collide and get stuck together, to explain the result of the process you need to use the tools of Physics. Physics is a science of the small and the large. I think Robert has it right in that a definition should include the context of "chemical reaction". I still stand that Chemistry is the science of stuff... stuff meaning matter, i.e., material, while Physics is the science of energy (kinetic, potential(fields, mechanical, chemical, thermal, electromagnetic)). Physics needs matter to study the interactions of energy and Chemistry needs energy to study the interactions of matter. --William Weaver 04:56, 22 December 2006 (CST)

As a matter of fact that difference might be - for beginnings - easy to explain if you use metaphors. Not common in starting a subject. If I were to put it, I would try to say it like this: chemistry describes the properties of all matter and its interaction viewed like a sticky ball: either matter sticks apart totally or it loses some part changing the properties of the original substances into new substances or matter. Physics does it the same way it also studies the properties of matter but based upon the hard ball image atoms and molecules tend to show. (Matter can bounce off other matter). Physics is trying to understand what is inside the matter, either by destructing it or fusing it with other matter to get different resulting matter. This resembles chemistry but where the basic matter in chemistry doesn't change (atoms stay the same atoms, protons, nuclei and electrons stay the same) in physics that is not necessarily the case. In physics you can see radioactive atoms decaying into different atoms with different chemical properties, where in chemical reactions atoms or molecules create different molecules, but the atoms remain the same.

Robert Tito