PLEASE HELP! Which statement below describes the properties of a penny on Earth compared to a penny on Mars?

- The density of the penny would change because the mass would change.

- The volume of the penny would change because the weight would change.

- The mass of the penny would change but the density would remain the same.

- The weight of the penny would change but the mass would remain the same.

Which statement about relative potential energy of electrons is correct? a. an electron in the 2 p orbital of the second electron shell has more potential energy than an electron in the 2 s orbital of the second electron shell. b. an electron in the 2 p orbital of the second electron shell has more potential energy than an electron in the 3 p orbital of the third electron shell. c. an electron in the 3 p orbital of the third electron shell has more potential energy than an electron in the 2 p orbital of the second electron shell.