Which valences have the greatest tendency to form ions? 1)+1 2)-1 3)+2 4)-2 5)+3 6)-3 7)+4 8)-4 you can pick more then one

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Which valences have the greatest tendency to form ions? 1)+1 2)-1 3)+2 4)-2 5)+3 6)-3 7)+4 8)-4 you can pick more then one

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+1, -1, +2, -2, +3, -3