Select the correct answer.

Which element is more reactive than rubidium (Rb)?

A.
aluminum (Al)
B.
cesium (Cs)
C.
strontium (Sr)
D.
beryllium (Be)

What are the spectator ions in 2h+ + so42- + ca2+ + 2r → caso4 + 2h+ + 21?

Which of the following are correct values for the ideal gas laws constant r

How is energy related to the change of state represented by the model? atoms gain energy as a solid changes to a liquid. atoms gain energy as a solid changes to a gas. atoms lose energy as a solid changes to a liquid. atoms lose energy as a solid changes to a gas.