As the elements in group 17 on the periodic table are considered from top to bottom, what happens to the
atomic radius of each successive element and why
does this occur?
A) Atomic radius increases because there are less
electron shells
B) The atomic radius increases because there are
more electron shells
C) The atomic radius decreases because there are
more electron shells
D) The atomic radius decreases because there are
less electron shells

2fe + 3h2so4 -> fe2(so4)3 + 3h2

it is necessary to balance equations in order to get the proper amount of reactants as well as products in order not to make a miscalculation.

you cannot change the subscripts as that would change the substance itself. for instance, diatomic elements such as h2 only have the subscript two when a gas. another example would be so4, if you were to change the subscript, the element would no longer be sulfate.

we change the coefficients instead as that only changes the number of molecules rather than the substance itself.

hope this !

idk i’m struggling too