Which of the following elements are not main-group elements?
check all that apply.
pb
mo
cs
br
al

Which of the following pairs of elements belong to the same groupa. h and he b. li and bec. c and pb d. ga and ge

Which type of precipitation would most likely form when the surface air temperature is slightly below freezing and the air temperature increases as you move upward away from the ground?

Areaction is first order with respect to reactant x and second order with respect to reactant y. which statement describes the rate law for this reaction?