Answer:
The correct answer is A.
Explanation:
Helium's Atomic Model has 2 Protons and 2 Neutrons, and on the outside it has 2 electrons circling around it.
The transport of O2 from the outside air to tissue cells and the transport of CO2 from tissue cells to the outside is known as.... gas exchange.
Answer:
2H + O -------> H2O
and hydrogen react with oxygen so it is oxide of hydrogen
like iron react with Oxygen and give
iron oxide
Explanation:
