Which of the two molecules, propane (c3h8) or heptane (c7h16), would have a a. greater london dispersion forces b. lower boiling point c. greater viscosity?

iron and sleel

make siroeel

the density(ratio between mass and volume as m/v) decreases from top to bottom in periodic table group as the size increases and nuclear charge decreases. but in periods density increases from left to right as atom size decreases and nuclear charge increases.