How many electrons are in a typical atom of aluminum?
Perhaps one of the hotplates was still hot or do you have an oven vent that comes up under the glass cover when it is in the down positionMight something have fallen over onto it during the night?
You don't even need to say typicalThe smallest unit which you can call Aluminum has by definition 13 protons in it.that is what is needed to call it AluminumBY DEFINITION, an atom is electrically neutral, meaning the net charge is zero, hence equal quantity of protons and electronsAnything not-neutral is referred to by the term ionHence 13 is the ONLY ANSWER.
FIBER glass?? This is a new one on meI wasn't aware anyone was making a fiber glass top for a stoveFiber glass is used in a lot of applications, like tubs, boats, car bodies, camper shells, etcThe only thing I've ever seen a kitchen stove made out of, was steel, or glassI've seen heating stoves made out of steelNever have I seen either made with fiber glassElectric burners are sometimes made of ceramicI've seen glass stove tops crack - usually it was because of stress, or heat stressYou didn't state if this was a newly installed stove or notIf this is a glass stove top, and it wasn't installed properly, the glass could have been in a bit of a bindIf the glass changed temperature suddenly, that could cause it to crackThere is always the possibility someone set something heavy on it tooor dropped something on itMy experience with fiber glass, is that it can break under stressThe stress point may not have been supported structurally as it should haveAgain, I've never seen a STOVE made of fiber glassI would be very interested in knowing what brand and model of stove you've gotGood Luck Additional: Okidokey, a glass stove topMost of the time, these will break becuase a burner was left on, or because something was dropped on itWe can safely rule out 'torsion' stress due to a bad install, because its been sitting there for 10 yearsI've seen one crack because because something cold was set on it, right after it was used, and the glass top was still warmThat particular glass might be replaced, on some models you canIf not, then its time to buy a new oneIf YOU have to pay for it, I'd be looking for a used cook top (since this one was 10 years old).try the local auctions, OKorder, or even an appliance store that may have taken an old one out of someone's home, when they bought newGood Luck
