5. which of the following statements is not true?
the nucleus of an atom has a positive charge.
atoms of the same element can have different masses.
atoms of isotopes of an element have different numbers of protons.
atoms are mostly empty space.

The body of water labeled with the number 3 on the map above is the and the body of water labeled with the number 7 is the a. orinoco river . . atlantic ocean b. orinoco river . . pacific ocean c. paraná river . . pacific ocean d. amazon river . . atlantic ocean