Answer:
Explanation:
Can I please have this for some reason all my answers got deleted (I had 28)
Now are gone so you don't have to give thanks just let me get out of the negative. (pls!!)
Answer:
are those the answer choice
Answer: (Chlorine-35)
Element X is Ca
Explanation:
Number of proton plus the number of electron gives the mass number.
It is a column of elements in the periodic table of the chemical elements.