The atomic number is the number of protons so it’s 9 Protons and 11 Neutrons.
The second one is 36 Protons and 17 Neutrons.
Hope this helps!
can you explain a little more please
Compatibility in the ABO blood type is necessary for the blood transfusion, but that is not sufficient to determine the possible donor.
The Rh factor should also be taken into consideration when determining blood transfusion compatibility. A person can be Rh positive or negative, and the Rh positive Rh blood donors can only donate to other Rh-positive people.
