Since both objects have a charge of +1 C, they will experience a repulsive force due to their like charges. The amount of electric force between two charges can be determined by Coulomb's law, which states that the force is proportional to the product of the magnitudes of the charges and inversely proportional to the square of the distance between them.
Given that both charges are +1 C and are only 10 mm (0.01 m) apart, the force will be quite strong. Therefore, the most likely type and amount of electrical force between the two objects will be:
strong repulsive.