Which of the following is a diatomic molecule?

ca2-

n2

kcl

mgcl2

Diatomic molecules are only composed of 2 atoms so it would have to be MgCl2

Answerthe energy required is 1.60 × 10⁻¹⁸ j, to three significant figures.explanationwe define electric potential as the ratio electric potential energy to the charge,    then the following gives us the potential difference,      the formula  may be on your formula sheet.the change in electric potential energy would be the energy that would needed to move it from point a to point b. solving for that, we get    using q = 8.00  × 10⁻¹⁹ c and  δv = 2.00 v, we get    the energy required is 1.60 × 10⁻¹⁸ j, to three significant figures.

The geological theory that states that pieces of earth's lithosphere are in constant slow motion is the theory of plate tectonics.