<span>The mass number given on
the periodic table is a weighted average of all the isotopes. You get the exact mass of
an isotope by adding the protons(atomic number) to the
number of neutrons in that isotope.</span>
Perhaps because of the chlorine atom
Answer:
For water to change from a liquid to a gas, thermal energy needs to be added.
Explanation:
I believe that Zinc has two more protons than nickel