If the electron configuration of magnesium is (2.8, 2], what is the electron configuration of the element before it on the periodic table? (1 point)
[2.8,5)
O [2.8.1)
[2.8, 3]
[2.8)

Consider the following reaction at equilibrium: c(s)+h2o(g)⇌co(g)+h2(g) predict whether the reaction will shift left, shift right, or remain unchanged upon each of the following disturbances. a) c is added to the reaction mixture. b) h2ois condensed and removed from the reaction mixture c) co is added to the reaction mixture d) h2 is removed from the reaction mixture.