Answer:
Option 1: 28 is the correct answer.
Step-by-step explanation:
The given expression for sum is:
There will be four terms in the sum
We have to find the terms by putting n=1,2,3,4 as n=1 to 4
Putting n=1
Putting n=2
Putting n=3
Putting n=4
So the summation will expand to:
Hence,
Option 1: 28 is the correct answer.
Answer:
The charge on the ion is +3.
Step-by-step explanation:
We are given the following in the question:
Number of protons = 26
Number of electrons = 23
Charge on 1 proton = +1
Charge on one electron = -1
We have to calculate the total charge on the ion.
Total charge on ion =
=(Number oof proton)(Charge of proton) + (Number of electron)(Charge of electron)
Thus, the charge on the ion is +3.