Water.
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<span>The
mass of an atom comes from the protons and neutrons that are found in the
nucleus. The number of protons is the atomic number of an element. To find the
number of neutrons, subtract the atomic number from the mass of an atom. So the number of neutrons are 20 (mass number) - 5 (atomic number) = 15 neutrons.</span>
Answer:
Part 1:
Answer is in first photo below
Part 2:
Answer is in second photo below
I hope this helps!
Answer:
I think it goona be A am I right or wrong