Which of the following isotopes is NOT considered to be a major threat to human health from nuclear fallout? a. strontium-90 b. hydrogen-2 c. iodine-131 d. cesium-137

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.

b) nuclear ive learned that in a pedtrodic table