The mass would be 28. The mass of an atom equals the number of neutrons and protons added together. In this case, they do not say the protons. But we must use our inside knowledge to know that the number of protons equals the number of electrons. Thus, your number of protons would be 13
12% NaCl is the answer I came to... Have a GREAT day!!! :)
Answer:
sorry i dont know the answer but i hope you can figure it out soon
Answer: Iron
Explanation: There are little minnerals that make it magnetic.
