00:01
So for this question, we're asked to write our formulas for these compounds.
00:07
So we have rubium, which is in group one.
00:13
So it's a metal and nitride.
00:16
Well, that's a, that's nitrogen.
00:19
But for iodat at the end, so this is an ion compound.
00:22
So we have the charge for rubidium is rb plus and nitride, which is nitrogen, is n3 minus.
00:30
So combining these, we get rb3n.
00:34
And now we have potassium, that's k, group 1, so it has a plus 1 charge.
00:39
Selenide, which is selenium group 16.
00:46
So it has a 2 minus charge...