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transition metals
Predominantly, the transition elements, but also hydrogen, nitrogen, and oxygen. Actually all elements that have reactions can have more than one oxidation number in the sense that their oxidation number is 0 when they are in pure form and usually is some other value when they are in compounds.
Transition metals
the transition elements are those elements having a partially filled d or f subshell in any common oxidation state.
Transition elements usually have more than one oxidation number. In different oxidation numbers, the ions show different colors. Some of the ranges: Cu from +1 to +2; Cr from +2 to +6; Ni from +2 to +3; Co from +2 to +3 and Mn from +2 to +7.
transition metals
Most elements can have more than one oxidation number, but I think you are looking for the transition elements in groups 3 - 12.
Predominantly, the transition elements, but also hydrogen, nitrogen, and oxygen. Actually all elements that have reactions can have more than one oxidation number in the sense that their oxidation number is 0 when they are in pure form and usually is some other value when they are in compounds.
The Roman numeral in the parentheses is the valence or oxidation of the metal that it follows. Transition elements have more than one oxidation number
Transition metals
Sc and Zn are not classified as transition metals. They does not have stable different oxidation numbers.
the transition elements are those elements having a partially filled d or f subshell in any common oxidation state.
Transition elements usually have more than one oxidation number. In different oxidation numbers, the ions show different colors. Some of the ranges: Cu from +1 to +2; Cr from +2 to +6; Ni from +2 to +3; Co from +2 to +3 and Mn from +2 to +7.
No
yes. because they have multiple oxidation state
transition metals have variable oxidation states
Hydrogen has -1 and +1 oxidation numbers. Other elements have +1 only