A block of stone measures 15 cm x 15 cm x 20 cm. What is the total surface area of the stone? Hint: A block has six sides.

Answeramino acids;

Answercreating graphs and performing calculations;

Ithink about 50 % of an original isotope's number of atoms remain

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.