00:01
A neutral atom has no charge.
00:04
If it has no net charge, then that means the number of protons, which are positively charged, must equal the number of electrons, which are negatively charged.
00:19
And that's the only thing that we can know for certain if we know the number of protons.
00:26
So for this question, if you know the number of protons, what else should you be able to determine directly? the number of neutrons in the neutral atom? no, because neutrons represented here in purple are neutral, and changing the number of neutrons has nothing to do with the number of protons.
00:46
B, the number of electrons in the neutral atom? yes, this is the correct answer.
00:53
If we have, say, six protons in a neutral atom, then to have the atom be neutral, we need to have six electrons...