well if you know what carbon tetrafluoride is you probably wouldn't have those grades to begin with…
Chocolate periodic table! Hope a sample of each element is not found in each square!
Nerd humor. Don't know what I would if someone used this on me.
DNA jokes... Hah
#sechiudesolo4giorni #secchione #stacanovmeportaaspassoilcane #stacanovmefaunbip
Cronaca: #17:22 | #Obama contro Trump: "Io secchione lui meno attendo ai dettagli" (link: http://ift.tt/2iWy2qk )
the little weaver: Photo Use lattice curtain material for this. Lots of material for a monochromatic hanging
"a smart cookie" by walmazan
There She Goes’ Chemistry Stamp Set