Answer :
The force of attraction between a ca2 and an o2 ion is 5.9*10^-10N.
The force of attraction that exists between all mass bodies. An object with mass attracts another object with mass. The magnitude of the force is directly proportional to the mass of the two objects and inversely proportional to the square of the distance between the two objects.
Force of attraction between two ions is given as follows:
F= A/r^2
Here, r is the interatomic distance;
A is a constant. It is given by the formula:
[tex]A=\frac{1}{4\pi e}(z_{1} e)*(z_{2} e)\\\\ =\frac{1}{4*3.14*8.85*10^{-12} } *(2*1.602*10^{-19}C )*(2*1.602*10^{-19}C )\\ \\ \\ =9.23*10^{-28 }C^{2}mF^{-1}[/tex]
so
[tex]F=\frac{9.23*10^{-28} }{(1.25*10^{-9} )^{2} }[/tex]
=5.9*10^-10N
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