Question

what is the charge of a cation?
the charge depends on the size of the nucleus.
a positive charge
a negative charge
no charge

Explanation:

A cation is formed when an atom loses one or more electrons. Electrons have a negative charge, so losing them results in the atom having more protons (which have a positive charge) than electrons. This gives the cation a positive charge. The charge of a cation is not related to the size of the nucleus (as that mainly affects atomic mass and some nuclear - related properties), it is not negative (that would be an anion), and it is not neutral (neutral is for atoms that have not gained or lost electrons).

Answer:

a positive charge