What is the isotope notation for an element with a mass number of 226 and 138 neutrons?

                         226RA 88

RA is for radium.

put 226 next to RA then put 88 below 226 and next to RA if you can or simply put 226RA88.

This is the best I could do hope this helps.

Sorry if it doesn't.

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.

d

explanation: