The heat inside the Tupperware causes an increase in pressure and when enough pressure builds, the atoms need somewhere to go and the seal at the top is easiest to break, so the top blows off.<span />
Heterotrophs hope this helps.
A Non-metal and a Metal react together to form an ionic bond
metals lose electrons to match the numbers of their nearest noble gas
If is 67 because of the truck kbsisbe blue