Answer:
The Answer is A) S- duplication of the DNA, 23 pairs chromosomes
Explanation:
<span>An
atom with an atomic number of 12 has 12 protons. Because the mass
number is the sum of the protons and neutrons, the mass number would
need to be at least 12. I hope this helped!
</span>
There are more potassium ions inside the neuron than outside.