00:03
Hi there.
00:04
This question is asking about the naming of ionic compounds.
00:13
And ionic compounds are composed of a cat ion, which is a positive ion, and anion, which is a negative ion.
00:26
Metals, when they form ions, they lose one or more electrons to form cat ions, and non -metals gain one or more electrons to become anions.
00:38
Well, when we're talking about metals, some metals can form ions with more than one charge.
01:06
This is especially true of the transition metals.
01:11
For example, copper.
01:12
Copper, a copper atom can lose one ion, or one electron rather, and end up as an ion with a one plus charge.
01:21
Or a copper atom can lose two electrons and end up with a two positive charge.
01:29
So that means there are, if we're putting copper with chlorine, for example, there would be two possible combinations.
01:36
We could have c -u -c -l, or we could have c -u -c -l -2.
01:43
The first one results when we have copper with the 1 plus charge.
01:47
The second one results, or we have the copper with the 2 -plus charge.
01:51
So when we name these, this presents a problem.
01:55
Because we have copper and we have chlorine, which as an ion, is named chlorine.
02:02
But the second one is also copper and chloride.
02:11
So we need a way to tell these two apart.
02:13
These are two very different substances.
02:15
They have different colors...