Talk:Atomic weight

message: Describe the new page here.
Can someone go through the Atomic Weight and Molarity pages and explain what is the parenthetical number that follows the listed atomic weights?  Thanks!  —Preceding unsigned comment added by 71.127.163.62 (talk) 18:12, 2 January 2010 (UTC)
thread_title: Untitled

message: I propose that this definition be moved to be primarily "Relative Atomic Mass" with "Atomic mass" and "Atomic weight" as redirects to that. It is the more correct term, and therefore should have the title really. At the moment statements like "atomic weight...is the mass" do not even make a great deal of sense, and really are contradictory.
Any strong disagreement? Thought the change was major enough to ask views first...
:I can not see any reason why not, while I can see many reasons why. I say go ahead with it.
:I proposed it on the changes page and people disagreed saying that it should reflect current usage, and that RAM was not current usage (it is current everywhere I've been, and among physicists is certainly standard, but possibly not among chemists, they are known to be terminologically lazy I'm told). Hence I've not changed it yet.
This page is a mess! I basically agree with the above posts. Why are we still insisting on the archaic term atomic weight? Totally inconsistent to use weight with units of grams. I've been teaching chemistry for 20 years and only refer to atomic weight in a historical context. Current usage is atomic mass. I have revived the atomic mass page - still needs work. Comments? -Vsmith 02:24, 3 Nov 2004 (UTC)
replies: text: You are replying to a rather old discussion thread - the article has likely changed a bit in 5.5 yrs. Historical context and IUPAC seem to be of importance here. Although I agree with your concerns about weight/mass, it seems others don't -- and please keep the article usage consistent with the title. If you want a rename or move of the article - then seek consensus for that here first. Vsmith (talk) 11:14, 19 June 2010 (UTC)
thread_title:  Atomic mass 

message: Shouldn't atomic mass units be mentioned since that is what 1/12 of C-12 is?  —Preceding unsigned comment added by 202.182.91.94 (talk) 08:42, 16 April 2010 (UTC)
replies: text: Depends! Atomic weight in chemistry has always been a dimensionless quantity, because it is measured as a ratio of masses. Physics tends to be more interested in the masses of individual nuclides, and there it makes very little difference if you quote the result as a mass in amu or as a dimensionless relative mass. So to say that the atomic weight of chlorine is 35.5 u is wrong (there is no chlorine atom which has a mass of 35.5 u), but to say that the atomic masses of the two stable isotopes of chlorine are approximately 35 u and 37 u is correct. Physchim62 (talk) 10:28, 16 April 2010 (UTC)
thread_title:  A.M.U 

message: E.g. think that molar mass of water comes from mass of the hydrogen and the mass of oxygen. So kg/mol + kg/mol = kg/mol (1+ 1+ 16 or 0,001 + 0,001 +0,016 -> 0,018 kg/mol)  Ooops. These quantities must be additive! The original meaning of atomic mass is forgotten? A agree that the title of the artice will be Relative atomic mass. The mass is not weight (after 1903 CGPM) ZJ (talk) 20:15, 15 October 2010 (UTC)
thread_title:  Confused?