What is the chemical name of Ni
S
? Nickel sulfuride. Nickel(II) trisulfide. Nickel(III) Sulfide Dinickel trisulfide. Nickel(II) sulfide.
The Correct Answer and Explanation is:
The correct chemical name for NiS is Nickel(II) sulfide.
Here’s a detailed explanation:
Nickel sulfide (NiS) is a binary compound composed of nickel and sulfur. To determine the correct name, it’s important to consider the charge on the nickel ion. Nickel can form multiple oxidation states, specifically +2 and +3. Therefore, it’s essential to examine the context of the compound to figure out which oxidation state applies.
In this case, NiS contains nickel in the +2 oxidation state. To identify this, we look at the oxidation state of sulfur, which is typically -2 in most sulfide compounds. For the compound to be neutral, the total charge must balance to zero. Since sulfur has a charge of -2, the nickel ion must have a charge of +2 to balance the charge.
Thus, the correct name follows the rule for naming transition metal compounds. When a transition metal forms more than one possible ion, its oxidation state is indicated in parentheses using Roman numerals. For nickel in the +2 state, the correct name is Nickel(II) sulfide.
Why the other options are incorrect:
- Nickel sulfuride: This name is too generic and does not specify the oxidation state of nickel.
- Nickel(II) trisulfide: This name suggests there are three sulfur atoms in the compound, but NiS only contains one sulfur atom.
- Nickel(III) sulfide: This is incorrect because nickel in NiS has a +2 oxidation state, not +3.
- Dinickel trisulfide: This name would imply the presence of two nickel atoms and three sulfur atoms, which does not apply to NiS.
Therefore, Nickel(II) sulfide is the correct and most accurate name for the compound NiS.
