Cerium is the most abundant rare earth metal. Pure cerium ignites when scratched by even a soft object. It has four known isotopes: Ce-136(atomic mass=135.907 amu), Ce-138(atomic mass=137.905 amu), Ce-140(atomic mass=139.905 amu), and Ce-142(atomic mass=141.909 amu). Ce-140 and Ce-142 are fairly abundant. Which is the more abundant isotope?
Atomic Structure
The basic structure of an atom is defined as the component-level of atomic structure of an atom. Precisely speaking an atom consists of three major subatomic particles which are protons, neutrons, and electrons. Many theories have been stated for explaining the structure of an atom.
Shape of the D Orbital
Shapes of orbitals are an approximate representation of boundaries in space for finding electrons occupied in that respective orbital. D orbitals are known to have a clover leaf shape or dumbbell inside where electrons can be found.
Cerium is the most abundant rare earth metal. Pure cerium ignites when scratched by even a soft object. It has four known isotopes: Ce-136(
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