Rb reacts with O in a mole ratio of 2 to 1, forming the ionic compound Rb20. Which of the following elements will react with O in a mole ratio of 2 to 1, forming an ionic compound, and why? A)
S, because it is in the same group as O.

B)
Cs, because it is in the same group as Rb.

C)
Sr, because it is in the same period as Rb.

D)
Br, because the atomic mass of Bris similar to that of Rb.​

what is the general relationship between a galaxy's distance from earth and its speed?

the answer is:

the farther away a galaxy is from us, the faster it is moving away from us.

your parents i think this could be it

the solar system used to have much dust particles option no d

c)red bank

explanation:

red bank is a borough in monmouth county, new jersey, incorporated in 1908 and located on the navesink river, the area's original transportation route to the ocean and other ports.