The oxidation numbers for Nitrogen are respectively -3, +5, +4
A physical change is a change to a sample of matter in which some properties of the material change, but the identity of the matter does not. Physical changes can further be classified as reversible or irreversible. The melted ice cube may be refrozen, so melting is a reversible physical change.
4
They need more oxygen due to higher temperatures
Answer:
copper
Explanation:
ions in solution absorb light in the red region of the spectrum. The light which passes through the solution and out the other side will have all the colors in it except for the red.
