How to find a maximum and minimum oxidation number of metals and non-metals?

• 1.
  State if the following changes involve
  oxidation (O)
  or reduction (R) or neither (N)

  Fe²⁺ → Fe^{3+ O}

  I₂ → I¯ R

  F₂ → F₂O R

  C₂O₄^2- →
  CO_{2 O}

  H₂O₂ →
  O₂ O

  2.
  Balance the following half equations…

  Na+ e- → Na ⁺

  Fe²⁺ → Fe³⁺ +e –

  I_{2 +} 2e- →
  2 I^¯

  The following table shows the successive ionisation energies for Carbon and Oxygen;

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Use this table to predict the electron configurations of these elements.

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Please can you check if my answers are correct and guide me, please? Thank you in advance

• What will be the usual and the maximum oxidation state in compounds of:

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