Answer:
I think it's A: Sodium is needed to generate an action potential
Eukaryotic cells are cells with a nucleus while prokaryotic cells do not have a nucleus.
1) divergent boundaries - where plates move away from each other.
2)convergent boundaries - where plates move toward each other and collide.
3)transform boundaries - when two plates grin past each other.
Boron's atomic number is 5, so for its 5 protons, it should have 5 electrons if it's neutral.
To make it an ion, Boron's charge would have to be negative or positive. It could lose one electron to have a charge of +1, gain an electron to be -1 ion.
Ions aren't at specific number. So the answer depends on Boron's tendency to gain or lose electrons.