Answer:
Muscular contractions that moves food along the digestive tract.
Answer:
Examples of radioactive isotopes include carbon-14, tritium (hydrogen-3), chlorine-36, uranium-235, and uranium-238.
Magnesium will give two electrons to oxygen and both will become ions.
<span>some elements would be Beryllium, Barium, Magnesium, and Strontium</span>