Using the periodic table, determine the ion charges of the following elements if valence electrons were removed or added to reach the octet. barium = iodine = potassium = aluminum =

Hi, there!

The answer to your question is as follows: 
Given that the valence electrons were removed or added to the following elements to fulfill the octet, barium's charge would be +2, iodine's -1, potassium's +1, and aluminum's +3.  

I hope this helps!

60 ÷ -20 x makes x = -3