Incorrectly regarded as goofs: When Portman and Goat check the chemical levels in the airlock, Portman mentions magnesium, chromium, and lead. We see his "chemical detection" device, and in the order he stated, follow the symbols Mg, Cr, and Ld. The symbol for lead is not Ld, but Pb. However, this is not necessarily a goof, since the device is not labeled as a Periodic Table, and the display may be "dumbed down" for common usage by lay people. "Ld" is a reasonable abbreviation for Lead for people without a chemistry or Latin background (Latin for metallic lead: Plumbum).
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