Which one of the following to all methods of heat transfer require? a. A difference in thermal energy

b. A liquid or gaseous state

c. Direct physical contact

d. The movement of particles

Which is true of transition metals when moving from left to right on the periodic table? the d sublevels are not filled across the period. the cation radii become larger across the period. atomic radii increase slightly and then start to decrease. atomic radii decrease slightly and then start to increase. o

If the particles in a sample of matter have an orderly arrangement and move only in place, the sample is a

How many moles are in 123.0 grams of kclo4?