Oxidation or reduction: the loss of hydrogen

Oxidation or reduction: an oxidising agent has undergone

Oxidation or reduction: the magnesium reacting with an acid (the magnesium has been)

Oxidation or reduction: a reducing agent has undergone

Oxidation or reduction: the gain of electrons

Oxidation or reduction: carbon burning

Oxidation or reduction: an element becoming a negative ion

Oxidation or reduction: Photosynthesis 6CO₂ + 6H₂O --> C₆H₁₂O₆ + 6O₂

Oxidation or reduction: the loss of electrons

Oxidation or reduction: the loss of oxygen

Oxidation or reduction: an oxidant has undergone

Oxidation or reduction: iron sands smelted to molten iron

Oxidation or reduction: the gain of oxygen

Oxidation or reduction: burning magnesium (the magnesium has been)

Oxidation or reduction: a reductant has undergone

Oxidation or reduction: an element becoming a more positive ion

Oxidation or reduction: Respiration C₆H₁₂O₆ + 6O₂ -> 6CO₂ + 6H₂O

Oxidation or reduction: the gain of hydrogen