Question

2. The electrostatic force between two identical ions that are separated by 5.0 Å is 3.7 <10 N. What is the charge
on each ion? How many electrons are missing from each ion?​

Answer 1

Answer:

Given, the force of repulsion between two equally positively charged ions =3.7×10

−19

N

Distance of separation, d=5Å =5×10

10

m

To find the number of electrons missing from each ion.

Let us suppose charge is q

1

=q

2

=q

Let n be the number of electrons missing.

Using Coulomb's Law, F=

4πε

0

1

d

2

q

1

q

2

F=

4πε

0

1

d

2

q

2

So, q

2

=4πε

0

×F×d

2

=

9×10

9

1

×3.7×10

−9

×(5×10

−10

)

2

=10.28×10

−38

q=3.2×10

−19

C

As, q=ne

So, n=

e

q

=

1.6×10

−19

3.2×10

−19

n=2