00:01
Okay, so we want to determine the amount of protons and electrons in these atoms.
00:09
And we're assuming that they are neutral atoms.
00:12
And so the great thing is that the number of protons equals the number of electrons.
00:19
So you just have to figure out the number of protons.
00:21
And to figure that out, you look on the periodic table and find its atomic number.
00:26
That's going to be like the big number on the periodic table.
00:29
And for each element, and that's going to give you the number of, protons, which also equals the number of electrons.
00:35
So let's go through and figure these out.
00:37
So manganese, first we'll look on the periodic table, and that is kind of in the middle.
00:42
It's number 25.
00:43
There's going to be 25 protons and 25 electrons...