What is the formula for sodium sulfide?
When dealing with ionic compounds, it's important to know that the cation is always written first and the anion is written second.
In this case, sodium,
Now, what exactly is a sulfide anion?
As you know, anions that consist of a single atom are named using the suffix -ide. Removing this suffix will give you the identity of the parent atom, which in this case is sulfur,
To complete its octet, sulfur needs two more electrons. This means that the sulfur anion will carry a
Since sodium is located in group 1 of the periodic table, it will lose its valence electron and form
As you know, ionic compounds must be neutral. This means that you need two sodium cations to balance the negative charge of the sulfur anion.
The ionic formula for sodium sulfide will thus be
Sodium sulfide is a yellow in color, but aqueous solutions are colorless.