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Cl,Br and Iodine may have oxidation no +1 and -1
The oxidation numbers for the atoms in magnesium oxide are: Mg+2 and O-2.
hydrogen +1 in most of the compounds -1 in metal hydrides
The most likely elements are iron, ruthenium, osmium, chromium, cobalt, nickel, molybdenum
Hydrogen. +1 in most of the compounds -1 in metal hydrides and hydrocarbons
cerium
Cerium
Hydrogen it depends on the other element if it is part of a compound
No, it is not a redox reaction. None of the oxidation numbers changes during the reaction. You have to determine the oxidation number for each element and see if it changes from reactant side to product side. If the oxidation number doesn't change, it is not a redox reaction.
Sodium - it goes from oxidation number 0 to +1
First set. (3+,2-) X2Y3 both match at 6 Second set (5+,3-) X3Y5 bath match at 15
those elements which can donate two electrons will possess plus two oxidation state like calcium , magnesium ,etc...