Na2S
This compound is sodium sulfide.
NaS2 is an unbalanced equation. It would need to be Na2S to be a balanced equation (two sodium, one sulfide). Na2S is Sodium Sulfide.
It will dissolve.
Sodium sulfide
The name for the compound with the formula Na2S is sodium sulfide.
The hydrate of Na2S is Na2S.9H2O. Its name is sodium sulfide nonahydrate.
COUMPOUND
The compound MgCl2 has the name of magnesium chloride.
Na2S
No. Na2S is highly basic.
This compound is sodium sulfide.
It's sodium sulfide.
Na2S is basic.
Sodium sulfide is the name used to refer to the chemical compound Na2S, but more commonly it refers to the hydrate Na2S·9H2O. Both are colorless water-soluble salts that give strongly alkaline solutions. When exposed to moist air, Na2S and its hydrates emit hydrogen sulfide, which smells much like rotten eggs or flatus.
Sodium sulfide or Disodium sulfide. Both are correct terms for that formula.
NaS2 is an unbalanced equation. It would need to be Na2S to be a balanced equation (two sodium, one sulfide). Na2S is Sodium Sulfide.