Describe how the following are alike and how they are different. (Select all that apply.) (a) a sodium atom and a sodium ion
same atomic number
different atomic number
could have the same mass number
same number of electrons
different number of electrons
same net charge
different net charge

(b) a sodium ion and a neon atom.
same atomic number
different atomic number
could have the same mass number
same number of electrons
different number of electrons
same net charge
different net charge

highlight the ones that are different and same

Cells in the nervous system have a potential difference of 70 mv across the cell membrane separating the interior of the cell from the extracellular fluid. this potential difference is maintained by ion pumps that move charged ions across the membrane. is this an emf? select the correct answer and explanation. 1)no. the ion pumps cannot separate charges; thus, they cannot create a potential difference. 2)yes. the ion pumps cannot separate charges, but they still can create a potential difference. 3)yes. the ion pumps can actively separate charge; thus, they can create a potential difference. 4)no. the ion pumps can separate charges, but they cannot create a potential difference.