Question

the plum pudding model of the atom states that each atom has an overall negative charge. each atom has a dense, positively charged center. an atom is a solid, indivisible sphere that makes up all matter. an atom is made up of electrons in a sea of positive charges.

Explanation:

The plum - pudding model proposed by J. J. Thomson describes an atom as electrons (negative charges) embedded in a uniform sea of positive charge, like plums in a pudding.

Answer:

an atom is made up of electrons in a sea of positive charges.