Which of the following statements is not true about alpha particles? a. essentially the same as a helium nucleus b. from an external source of exposure, it is less harmful than beta particle c. it is smaller than beta particle d. its velocity is less than that of a gamma ray

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.