Question

The alien element Xx is given to scientists to study in two forms: & Question 6 Not yet answered Points out of 1.00 P Flag question 310 125 Xx If the average atomic mass is 309.50 amu, which isotope is most abundant? Select one: o a. Cannot be determined ob. 310 O c. Both have the same abundance O d. 308

Answer 1

Anorex isotope 2 12*** isotope z 310X, nehage abome mors is weighted average of atomic manes of its isotopes. Average atomic mars = Mini + Mzk2 where M, s. Ma atomic mass of colores nish are fractional abundance of its isotoper. mys 308 my M2 = 310 amu Average atomic mass = (308)4, + (310)22 309.50 - (308) 2, + (10) 42 we know not u = 1 - R2 = (1-2) 309.50 = 3087, + 310 (1-21) 309.50 - 308 Ml + 310-310n, (310-308), = 316 - 309.50 a = 05 22 = 0.25

M, = 0.25 22= -4, = 1-0.25 = 0.75 So 308 125 Xx abundance is 25% 3p is 75) - dunee Most abundent 12V 10310] 310