00:02
In this, the lithium 6, the atomic mass, atomic mass is 6, atomic number, atomic number is 3, which means the number of proton is 3 and the number of neutron is 3.
00:23
And it has no change, then the number of electron is equal to number of proton, that is 3.
00:27
You can see 3 protons, the electron, and 3 neutrons.
00:35
For lithium 7, for lithium 7, the atomic mass, atomic mass is 7 and the atomic number, atomic number is 3, which means that the number of protons would be 3, number of neutrons would be 4, and it has no charge, then the number of electrons is equal to number of photons, that is 3.
00:59
So 3 protons, 3 electrons and 4 neutrons.
01:07
This is for option a.
01:09
Then we go for option b...