Which combination of elements below will bond ionically in the same ratio as lithium when it honds to sulfur

sodium and oxygen

Explanation: Lithium can bond ionically with sulphur to form Lithium sulfide and it will have 2 lithium atoms in the bond as Li2S. Also when Sodium bonds with oxygen to form Sodium oxide, it has 2 sodium atom which is in the same ratio as the lithium.

answer;

d. are made mostly of liquid

explanation;

-the general   composition and structure planets includes; they have a thick gas and liquid layer covering a small,solid core. mostly the gases are hydrogen and helium atmosphere and layers of liquid hydrogen. for instance neptune and uranus are examples of the outer planets, they have a core covered by ice and ammonia.

-neptune's atmosphere is hydrogen and helium with a bit of methane so there is no oxygen to breath and the interior is made up of frozen water and ammonia with a rock and iron core. thus, there is no liquid water or solid surface to survive.