What is the name of CrS subscript 3?
Chromium (III) Sulfide?
But S has a -2 charge... -2(3)=-6
Cancellation of the charge need to occur.
I don't understand this.
http://www.endmemo.com/chem/compound/crs3.php
This is Cr +6 not +3
The name of the compound CrS subscript 3 is chromium(III) sulfide. In this compound, chromium has a charge of +3 and sulfur has a charge of -2. To balance out the charges, three sulfur atoms are needed to match the +3 charge of chromium. The subscript 3 indicates that there are three sulfur atoms present in the compound for every one chromium atom.
The name of CrS subscript 3 is indeed Chromium (III) Sulfide.
To understand how to determine the charge of chromium in this compound, we need to consider the following information:
1. The formula CrS indicates that there is one chromium atom (Cr) combined with one sulfur atom (S).
2. The subscript 3 indicates that there are three CrS units present in the compound.
Now, let's discuss the concept of charges.
In ionic compounds, elements can gain or lose electrons to achieve a stable electron configuration. Metals tend to lose electrons and form positive ions (cations), while non-metals tend to gain electrons and form negative ions (anions).
Chromium is a transition metal, and its charge can vary in different compounds. To determine the charge of chromium in this case, we need to consider the charge of the sulfur ion and the overall charge of the compound.
Sulfur (S) has a charge of -2 because it is a non-metal and tends to gain two electrons to achieve a stable electron configuration.
Since the compound CrS subscript 3 is neutral (has no overall charge), we need to balance the charges of the chromium and sulfur ions. To do this, we need three units of CrS, meaning that we have three sulfur ions (S) with an overall charge of -6 (3 x -2 = -6). Therefore, chromium must have a total charge of +6 in order to balance the sulfur charges and make the compound neutral.
Since the charge of chromium in this compound is +6, we represent this using Roman numerals in brackets after the metal name, resulting in Chromium (III) Sulfide.
I hope this clarifies the naming and charge determination process for you!