00:03
Hi there, in this question, we have a lead cat ion, and it has a 4 plus charge.
00:14
Looking at the periodic table, we see that lead is atomic number 82.
00:21
And what we want to know is how many electrons are present in this ion.
00:27
Well, a positive ion is, of course, a cat ion, and cat ions are formed by a loss of electrons.
00:38
When you lose negative particles, you end up positively charged because then there are more protons than electrons.
00:51
So this lead ion has lost four electrons from its neutral atom.
01:01
All right, so let's talk about that.
01:03
So if lead is atomic number 82, that means it has 82 protons...