Answer:
D
Explanation:
Because do all of that and then you do a conclusion
The fifth shell can hold up to 50 electrons and the forth shell can hold 8 electrons
A=mass number (protons + neutrons)
Z=atomic number (protons)
N=number of neutrons.
A=Z+N
Data:
A=24
N=13
Therefore:
24=Z+13
Z=24-13=11
Answer: The atomic number of this atom is 11. (The element is sodium)
