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Lanthanide boundary: Lanthanum (La) vs Cerium (Ce) — defining the start of the f‑block: Type-in
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- 01Which element is sometimes argued to be the first lanthanide because it has an electron in the 4f subshell in its ground-state neutral atom?
- 02Between La3+ and Ce3+, which trivalent ion has the larger ionic radius?
- 03What is the dominant oxidation state for the lanthanide elements in compounds?
- 04Which of the two elements, lanthanum or cerium, commonly forms a stable +4 oxidation state in compounds?
- 05Which element is often listed as the first member of the lanthanide series in many periodic tables?
- 06Which of the two elements, lanthanum or cerium, is the most abundant of the lanthanides in the Earth's crust?
- 07Which of the two elements has no 4f electrons in its neutral ground state (i.e., an empty 4f subshell)?
- 08What is the commonly given ground-state electron configuration for neutral cerium?
- 09What is the commonly given ground-state electron configuration for neutral lanthanum?