19. cerium is the most abundant rare earth metal. pure cerium ignites when
scratched by even a...
Chemistry, 30.10.2019 09:31 alyssams1213
19. cerium is the most abundant rare earth metal. pure cerium ignites when
scratched by even a soft object. it has four known isotopes: "ce (atomic mass
= 135.907 amu), ce (atomic mass = 137.905 amu), 4°сe (atomic mass =
139.905 amu), and "ce (atomic mass = 141.909 amu). ce-140 and ce-142 are
fairly abundant. which is the more abundant isotope?
Answers: 2
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