Answer:
, attractive
Explanation:
The charge of one electron is
And the first object has an excess of 74 electrons, , so the net charge of the first object is
The charge of one proton is
And the 2nd object has 50 less electrons than protons, , so the net charge of the 2nd object is
The electric force between two charged objects is given by Coulomb's law:
where
k is the Coulomb's constant
is the charge on the 1st object
is the charge on the 2nd object
r = 0.35 m is the distance between the two objects
Substituting, we find:
And the negative sign indicates that the force is attractive (in fact, the electric force between two charges of opposite sign is attractive, while the force between two charges of same sign is repulsive)