What 2 statements that are true about all elements All elements exist in the solid phase

All elements have 6 electrons

All elements are metals

All elements are pure substances

All elements exist only in the liquid phase

Each element is made up of the same type of atoms

Each element is made up of different types of atoms

Answer is: hydrogen is being oxidized.chemical reaction: co₂ + h₂ → co + h₂o.oxidation half reaction: h₂ → 2h⁺ + 2e⁻.reduction half reaction: c⁺⁴ + 2e⁻ → c⁺².oxidation is increase of oxidation number, hydrogen change oxidation number from neutral charge (in molecule of hydrogen) to oxidation number +1 (in water).

The independent is what is changed, the dependent is was is measured or the reaction.