(Na + -K +)-ATPase (2) o ATP transiently phosphorylates Asp to form a high energy intermediate = All P-type ATPases o While every single reaction step is reversible, the entire transport cycle is not.
Atomic mass of magnesium (Mg) is 24.305 g/mole The atomic number is 12.
Mg has 12 protons in its nucleus - these are positively charged Surrounding the nucleus are 12 negatively charged electrons. Because the number of positive charges matches the negative charges, the atom is overall neutral The neutral atom can lose 2 electrons from its outer shell. This leaves 12 positively charged protons, and only 10 negative charged electrons The magnesium ion has 10 electrons and a charge of 2+ . The Mg atom - like all atoms - does not lose protons from the nucleus, in the chemistry that you are studying. It can only lose or gain electrons.