Answer:
A. 18
Explanation:
Sulfur number sixteen forms a negative
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Protons and neutrons are found inside the nucleus
Answer:
Exchange across cell membranes - diffusion. The higher the concentration gradient, the faster the rate of facilitated diffusion, up to a point. As equilibrium is reached the concentration gradient is much lower because the difference in concentrations is very small so the rate of facilitated diffusion will slow down and level off.
Explanation:
There are 20n nutrons in the atom k-42.