00:01
Hello guys, so in this question we are given a nucleus or an atom rather x18778 and we have to answer a few questions based on this.
00:13
So the first part is what is the net electric charge? so the net electric charge q equals n times e where n is the number of protons.
00:23
The number of protons is 78 and the value of e is 1 .6 multiplied by 10 .19 coulomb.
00:32
So for a the final answer is 1 .25 multiplied by 10 power minus 17 coulomb.
00:42
For the part b we have to find the number of neutrons.
00:47
So the number of neutrons is just 187 minus 78.
00:52
The final answer for b is 109.
00:57
For part c we are given number of nucleons.
01:03
So the number of nucleons is equal to 187 only.
01:07
The number of nucleons is 187.
01:10
The final answer for this is 187.
01:14
For part d we have to find the radius of each nucleus.
01:19
So the radius is given by r0 multiplied by e power 1 by 3.
01:26
So a is 1 .25 multiplied by 10 power minus 15 and a is 187.
01:34
So 187 whole to the power 1 by 3.
01:37
The final answer for d is 7 .15 multiplied by 10 power minus 15 meter...