00:01
Remember to form an ionic compound.
00:06
We need to have a metal combined with a non -metal.
00:18
And when looking at the periodic table, the metals are found on the left -hand side to the bottom.
00:27
And the non -metals are found on the right -hand side up at the top.
00:34
So these are metals.
00:42
Crossing this, these are non -metals, and these down here are also metals.
00:53
So if we have fluorine, which is found right here, it's a non -metal, combined with strontium, which is found on the metal side over here, this will be an ionic compound.
01:13
So i think they've identified that as a.
01:17
No, we'll just call it a.
01:20
So it's going to be yes, it's ionic.
01:23
And the formula will be sr, which takes on a 2 plus charge because it's in group 2a.
01:30
And then with fluorine taking on a 1 minus charge, it'll have to be srf2 so that we get a neutral compound.
01:41
Then we've got calcium and sodium...