The atoms in air are combined with oxygen present in the air and when we inhale the air, oxygen is moved into the body then atoms in oxygen are carried by red blood cells the blood is pumped to the lungs and when oxygen is transported to the body organ, the atoms in lungs become the part of human cells.
Electron structure of sodium:
₁₁Na: 1s²2s²2p⁶3s¹
Answer: D!! ( difference in the potential energy of the reactants and products )
Explanation:
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