Answer
H$_2$O is a liquid at room temperature due to the large degree of difference in attraction and charge between hydrogen and oxygen atoms. On the other hand, sodium and hydrogen both share a relatively similar charge, causing almost no attraction between individual H$_2$S atoms, which causes a gaseous state at room temperature.
Work Step by Step
The difference in polarity between hydrogen and oxygen atoms causes individual molecules of H$_2$O to be drawn together, causing its liquid state at room temperature.
The lack of differing polarity between hydrogen and sodium atoms makes it difficult for individual molecules of H$_2$S to clump together to form a liquid at room temperature.
