Which element has six energy levels?

a) rubidium (rb)

b) cesium (cs)

c) potassium (k)

d) sodium (na)

What diagram shows the ionic compound of magnesium oxide

Compare the equilibrium constants for the systems shown in the table. which favors products the most? which favors products the least? rank these systems in order from most to least in terms of favoring products rather than reactants. d > b > a > c c > a > b > d b > c > d > a a > d > c > b

What forms when chemical reactions combine pollution with sunlight?