Talk:Atom

From Wikipedia, the free encyclopedia
Jump to: navigation, search
Featured article Atom is a featured article; it (or a previous version of it) has been identified as one of the best articles produced by the Wikipedia community. Even so, if you can update or improve it, please do so.
Main Page trophy This article appeared on Wikipedia's Main Page as Today's featured article on July 9, 2008.
          This article is of interest to the following WikiProjects:
WikiProject Physics (Rated FA-class, Top-importance)
WikiProject icon This article is within the scope of WikiProject Physics, a collaborative effort to improve the coverage of Physics on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.
Featured article FA  This article has been rated as FA-Class on the project's quality scale.
 Top  This article has been rated as Top-importance on the project's importance scale.
 
WikiProject Chemistry (Rated FA-class, Top-importance)
WikiProject icon This article is within the scope of WikiProject Chemistry, a collaborative effort to improve the coverage of chemistry on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.
Featured article FA  This article has been rated as FA-Class on the project's quality scale.
 Top  This article has been rated as Top-importance on the project's importance scale.
 
WikiProject South Africa / PSP SA (Rated FA-class)
WikiProject icon This article is within the scope of WikiProject South Africa, a collaborative effort to improve the coverage of South Africa on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.
Featured article FA  This article has been rated as FA-Class on the project's quality scale.
 ???  This article has not yet received a rating on the project's importance scale.
Taskforce icon
This article is supported by Wikipedia Primary School project.
 
Wikipedia Version 1.0 Editorial Team / v0.5 / Vital / Core (Rated FA-class, Top-importance)
WikiProject icon This article has been reviewed by the Version 1.0 Editorial Team.
Featured article FA  This article has been rated as FA-Class on the quality scale.
 Top  This article has been rated as Top-importance on the importance scale.

History[edit]

Is this video worth referencing in the article? I thought it might complement the history section section with the visuals http://ed.ted.com/lessons/the-2-400-year-search-for-the-atom-theresa-doud Jcardazzi (talk) 22:01, 4 April 2015 (UTC)jcardazzi

First evidence-based theory[edit]

For instance, there are two types of tin oxide: one is 88.1% tin and 11.9% oxygen and the other is 78.7% tin and 21.3% oxygen (tin(II) oxide and tin dioxide respectively). This means that 100g of tin will combine either with 13.5g or 27g of oxygen. 13.5 and 27 form a ratio of 1:2, a ratio of small whole numbers.

This explanation for 100g of tin confused me to expect the quantity of Oxygen to be 11.9g and 21.3g respectively for 11.9% and 21.3% Oxygen. It would be better if it was shown how the value was derived.

Quantity of Tin + Quantity of Oxygen = Quantity of Compound

Quantity of Compound = Quantity of Tin /  % of Tin in that compound * 100

For 100g of tin;
Quantity of tin(II) oxide = 100g ÷ 88.1 × 100
Quantity of tin(II) oxide = 113.50737797956867196367763904654 g


∴ Quantity of Oxygen = 113.5g - 100g
Quantity of Oxygen = 13.5g

Simillary we get
Quantity of tin dioxide = 127.06480304955527318932655654384 g
and Quantity of Oxygen = 127g - 100g
Quantity of Oxygen = 27g

Ajoe.blk (talk) 19:00, 18 April 2016 (UTC)

Spelling ... incresingly[edit]

HI

Para. 2 first sentence vague ? What does sentence refer to ?

which results, why incorrect

Atoms are small enough that classical physics give noticeably incorrect results. Through the development of physics, atomic models have incresingly incorporated

spelling ... incresingly

Fixed, thanks. Materialscientist (talk) 07:29, 1 May 2015 (UTC)

Vandalism[edit]

According to stats.grok.se, this time of year is when instances of vandalism to this article spikes. The school year has started. Editors, be on your toes.Kurzon (talk) 16:36, 4 September 2015 (UTC)

Kurzon: Fortunately vandalism is easy to detect and revert. I have the article in my watch list. Where do you see the vandalism statistics in stats.grok.se?. Thanks. Mario Castelán Castro (talk) 18:53, 4 September 2015 (UTC).
Clarification: I notice intuitively that vandalisms occur often this time of year, when the page views for this article spike.Kurzon (talk) 19:14, 4 September 2015 (UTC)
I see. Mario Castelán Castro (talk) 19:17, 4 September 2015 (UTC).

Dark Matter[edit]

There's statement about dark matter in the summary that reads: "Not all the matter of the universe is composed of atoms. Dark matter comprises more of the Universe than matter, and is composed not of atoms, but of particles of a currently unknown type." This gives the impression that dark matter is a real matter while the article about dark matter states that it is hypothetical matter. [1] — Preceding unsigned comment added by 78.82.5.162 (talk) 22:21, 15 October 2015 (UTC)

I just checked the article on matter and the word "matter" itself does not have a rigorous, universally-accepted definition. Until physicists sort out the semantics, "dark matter" can be as real as "ordinary matter".Kurzon (talk) 07:32, 16 October 2015 (UTC)

Daniel Tuyisenge Daniel Tuyisenge — Preceding unsigned comment added by 68.191.5.112 (talk) 18:45, 15 November 2015 (UTC)

PM[edit]

Someone please define "pm" - picometres in the section about atom size, pm = 1 trillionth of a metre. This is not at all obvious to the average reader. Avoid unexplained tech abbreviations/jargon! — Preceding unsigned comment added by 122.151.160.219 (talk) 01:41, 25 November 2015 (UTC)

Theoretical[edit]

the first section is "history of atomic THEORY", yet nowhere in the opening paragraph does it mention that the atom is theoretical. — Preceding unsigned comment added by Lymphoid (talkcontribs) 02:29, 18 December 2015 (UTC)

Copy-edit queries[edit]

I've just changed a few minor things. Question: "Atoms are small enough that classical physics gives noticeably incorrect results." Results on what? Size? Mass? Tony (talk) 10:39, 6 February 2016 (UTC)

External links modified[edit]

Hello fellow Wikipedians,

I have just modified 2 external links on Atom. Please take a moment to review my edit. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. I made the following changes:

When you have finished reviewing my changes, please set the checked parameter below to true or failed to let others know (documentation at {{Sourcecheck}}).

YesY Archived sources have been checked to be working

Cheers.—cyberbot IITalk to my owner:Online 18:26, 31 March 2016 (UTC)

Brownian motion[edit]

Botanist Robert Brown looked observed pollen grains not dust grains.[2] — Preceding unsigned comment added by 41.45.221.97 (talk) 15:29, 3 May 2016 (UTC)

External links modified[edit]

Hello fellow Wikipedians,

I have just modified one external link on Atom. Please take a moment to review my edit. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. I made the following changes:

When you have finished reviewing my changes, please set the checked parameter below to true or failed to let others know (documentation at {{Sourcecheck}}).

YesY Archived sources have been checked to be working

Cheers.—cyberbot IITalk to my owner:Online 03:36, 27 May 2016 (UTC)

  1. ^ https://en.wikipedia.org/wiki/Dark_matter
  2. ^ BBC Four - Atom, Episode 1: The Clash of the Titans, Jim Al-Khalili, 2007. DVD