BBC | Chemistry: A Volatile History | Ep 2 The Order of the Elements (3 of 6)

[RJL738]

That is so noble that a mother would work that hard and maybe sacrifice that much to nurture her son's intelligence and for someone with that gift to have what they need to grow. It's true he is saying in general but gases do not contain equal number of molecules atoms have different picometer diameters they combine differently and their properties make then have different proximities or whatever.

[jhony357]

@Shyraen Wrong. The atomic number is the number of protons inside the atom, which differs from the atomic weight, since the atomic weight also takes into account the number of neutrons in the atom. So Helium, number 2, has a weight of 4. And Americium has a lower atomic weight than Plutonium, though it has a higher atomic number.

[trumpeterteddy]

@jhony357 you are partially correct, the atomic weight is actually the average of the atomic weights of the elements isomers according to their abundance. Each isomeric atomic weight is however, the protons plus the neutrons present within the nucleus.

[jhony357]

@trumpeterteddy Concise yet powerful clarification. Thanks a lot! Always bothered me all those decimal points in the periodic tables >.<!

[jeromesim]

Law of octaves by arranging the element by atomic weight? Should'nt it by atomic number? ._.

[1RadicalOne]

Thank you. Some of those look rather interesting.

[1RadicalOne]

A shame; no Rubidium and (not like they would actually include it) Cesium.

[myjizzureye]

@1RadicalOne I think you have stockpiled copious quantities of fagium.

[1RadicalOne]

What?

[myjizzureye]

Sorry i was just letting everybody know how clever i am buy mentioning they left out Rubidium. Yeah thats just how sad i am really.

[Slickback83]

lol

[Tazwegian]

@myjizzureye lol

[parabat7]

@myjizzureye Ever seen what Ru dies in water??? Then you'd know why they left it out.

[myjizzureye]

@parabat7 O.o Meth much?

[Slickback83]

lol

[roadbeef]

hahaha yessss win

[igor2igor]

hahaha thats funy