Write out the electron configurations of the ions below and determine which one is listed with an incorrect charge. (the numbers and charges written after the elemental symbol should be understood as superscripts) A. I-
B. O2+
C. Al3+
D. Mg2+
E. none of the above

B

it must be O2- not O2+, because it's an anion not a cation.

when [oh-] is 10-5  m, and [h3o+] is 10-9  m, the poh is 5 and ph is 9. again in both cases the sum of ph and poh is 14. however, the hydrogen ion concentration is not always going to be equal to exactly 1 x 10 raised to a negative number. for example, we skipped over the value of 2.0 x 10-7.

1.43 x 10^-11 j the guy commented the awnser just making sure u see it .