Walter White:  Let 's break it down . Hydrogen . What does that give us ?
Gretchen Schwartz: We 're looking at 63% .
Walter White: Sixty - three , that is a big bite . My next step 's got ta be oxygen .
Gretchen Schwartz: Oxygen , 26% .
Walter White: Twenty - six . There you have your water .
Gretchen Schwartz: Carbon , 9% .
Walter White: Carbon , 9 .
Gretchen Schwartz: For a total of 98% .
Walter White: Right .
Gretchen Schwartz: Nitrogen , 1.25% .
Walter White: One - point - two - five .
Gretchen Schwartz: That brings you to _ 99 _ and a quarter . Which only leaves you with the trace elements down where the magic happens .
Walter White: Oh , wait a minute . What about calcium ? Calcium 's not a trace . Got a whole skeleton to account for .
Gretchen Schwartz: You would think , right ? Calcium 's only 0.25% .
Walter White: What ? That low ? Seriously ? Damn , I never would've thought that . Okay , so where does iron fit in .
Gretchen Schwartz: Iron . 0.00004%
Walter White: What ? You ca n't have hemoglobin without iron .
Gretchen Schwartz: Apparently , it do n't take take much . No doubt . Go figure .
Walter White: Sodium .
Gretchen Schwartz: Sodium , 0.04% . Phosphorus , 0.19% .
Walter White: Point - one - nine . There we go . So the whole thing adds up to ... 99.888042% . We are 0.111958% . Shy .
Gretchen Schwartz: Supposedly that 's everything .
Walter White: Yeah ? I do n't know , it just ... it seems like something 's missing , does n't it ? There 's got to be more to a human being than that .
Gretchen Schwartz: What about the soul ?
Walter White: The soul ? There 's nothing but chemistry here .