Which formula is an empirical formula?
a) c4h10
b)c3h6
c)ch4
d)c2h6

( the numbers should be smaller )

d.) circle motion requires a force to give it a centripetal acceleration.

periodic trends is an atom that gets larger as the number of electronic shells increase, the radius of atoms increases as you go down a certain group in the periodic table of elements. in general, the size of an atom will decrease as you move from left to right of a certain period.