To find how many proper subsets there are in a set you can use the formula n^2 -n and if you would also like to find all subsets including improper the formula is n^2 -n +1
that all atoms are elements and it will form a formula if it has a electron particle
The two elements carbon and oxygen combine to form carbon dioxide, which has CO2 as a formula. These elements combine in a one-to-two ratio, as shown in the formula.
Ammonia consists of the elements called Nitrogen and Hydrogen, froming the formula NH3.
Assuming no restrictions on the set, the cardinality of a set, n, is related in this form # of subsets = 2n
Potassium and Chlorine
It is sodium sulfide and the formula of it is Na2S.
group 1 elements.
CaF2
Nitrogen, oxygen, and the combined element to form nitrate.
The proportions of elements that combine to form one molecule.
MgS