Read the following chemical equation.

Fe(s) + O2 (g) → Fe3+ O2−
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What most likely happens during this reaction?

Iron loses three electrons.
Iron gains three electrons.
Oxygen loses one electron.
Oxygen gains one electron.

Iron looses three electrons which leads to the formation of the Fe3+ cation in the redox reaction equation.

The chemical equation is written as follows; Fe(s) + O2 (g) → Fe3+ O2−. Recall that a redox reaction equation is one in which there is loss/gain of electrons. The oxidation number of the specie that loose electrons increases while the oxidation number of the specie that gains electrons decreases.

We can see from the reaction equation shown above that iron looses three electrons which leads to the formation of the Fe3+ cation in the redox reaction equation.

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under a microscope, cancer cells may look very different from normal cells. they often have different sizes and some may be larger than normal while others are smaller. cancer cells are often abnormally shaped and the control centre of the cell (the nucleus) may have an abnormal appearance.

i think? ?

the correct answer would be d. hope this !