The atomic number of an atom of Br with a mass number of 80 is A) 115
B) 35
C) 45
D) 73
E) 80

In the millikan oil drop experiment they determined that every drop had a charge which was a while number multiple of -1.60x10^-19. if a drop has a total charge of -9.60x10^-19 then how many excess electrons are contained within the drop?

A50.0g sample of liquid water at 0.0 c ends up as ice at -20.0 c. how much energy is involved in this change?

Draw two cyclic constitutional isomers of cis-1