You add phenol red to a tube containing Elodea and let it sit in front of bright light for an hour. What color will the solution in the tube be at the end of the hour, and is the pH acidic or basic

Each calcium ion has a charge of +2, which can also be written as ca2+. if those ions move out of the neuron and no other ions are moving, the neuron would lose the positive charge associated with those ions and become more negatively charged.

Well you can immediately rule out a and d because if a metal were to lose or gain protons, then it would become a different element all together. the answer here is b because the positive symbol with a number refers to how many electrons the metal can give away to become stable.

Sorrr but idk whats its abou 9