New answers tagged elements
3
Since you are asking about vitamins vs. minerals, I assume what you mean by mineral is a "dietary mineral" (as opposed to the more typical meaning of mineral, which is a naturally-occurring inorganic compound). So:
A dietary mineral is an element that is essential for life (e.g., K, Ca, Fe, Se, Cr, P, I, Cl, Mo, etc.), and is required in small quantities. ...
2
All of these elements can form compounds in other oxidation states. Aluminium forms some compounds in the +1 state (e.g. see the section in https://en.wikipedia.org/wiki/Aluminium_iodide), as does Zinc (see the section in https://en.wikipedia.org/wiki/Compounds_of_zinc) and Cadmium (e.g. https://en.wikipedia.org/wiki/Cadmium(I)_tetrachloroaluminate). But ...
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