0:00
Hello.
00:02
In this case, in this question, we are given an isotope of lead, which is 82208.
00:08
Lead 82.
00:10
So the atomic number is 82 and the mass number is 208.
00:18
Okay, and we are supposed to find the number of protons, electrons and neutrons for this particular isotopes.
00:23
So number of proton is equal to number of electron, which is equal to the atomic number, which in this case is 82.
00:33
Right? so we are done with the first.
00:36
Part and then we have to find the number of neutrons number of neutrons will be atomic mass minus atomic number so that will be 208 minus 82 right so that will be 8 minus 2 is 6 9 minus 8 is 1 116 so that is the number of neutrons okay so we are done with the part a of the question then we have to find the symbol for an isotope which has 1 3 3 3 3 3.
01:15
32 neutrons.
01:19
Okay, so for finding the atomic mass of the new isotope, we have to add up the number of protons and number of neutrons, right? so it is given the number of neutrons is 132 and from here we can find that number of protons is 82 because that is the atomic number, right? so the mass number of the new isotope will be 132 plus 82.
01:49
So that comes out to 411 and 214.
01:55
So the mass number is 214.
02:01
Okay.
02:02
Now, so the symbol will be, symbol of the isotope will be.
02:06
See, for the isotopes, the atomic number remains same.
02:12
Only the mass number changes because of the different neutron number...