An unknown occupies a volume of 5 ml and Has a mass of 40 grams what is its density

Me i dont know what to do! the table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 10 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.

Hey can you me with this i really need y’all

The sum of the oxidation numbers in a neutral compound is always