The chemical reactions involved in the transformation of magnesium (Mg) to magnesium hydroxide (Mg(OH)2) are as follows:

Magnesium (Mg) reacts with oxygen (O2) to form magnesium oxide (MgO):
2Mg + O2 -> 2MgO

Magnesium oxide (MgO) reacts with sulfuric acid (H2SO4) to form magnesium sulfate (MgSO4):
MgO + H2SO4 -> MgSO4 + H2O

Magnesium sulfate (MgSO4) reacts with sodium hydroxide (NaOH) to form magnesium hydroxide (Mg(OH)2):
MgSO4 + 2NaOH -> Mg(OH)2 + Na2SO4

Therefore, the overall chemical reactions involved in the transformation of magnesium to magnesium hydroxide are:
2Mg + O2 -> 2MgO
MgO + H2SO4 -> MgSO4 + H2O
MgSO4 + 2NaOH -> Mg(OH)2 + Na2SO4