鈣
['20', 'Ca', '471', 'Wikipedia:Vital articles/Level/4', '鈣', 'Calcium', '7440-70-2', '1808-01-01T00:00:00Z', 'lime', 'Humphry Davy', ' Encyclopædia Britannica 11th edition', ' D23.119.100', 'DTXCID40876145', '1.0', '40.078', 'Ca', 'OYPRJOBELJOOCE-UHFFFAOYSA-N', 'C0006675', ' 1.23', 'InChI=1S/Ca', '[Ca]', '231-179-5', 'SY7Q814VUP', '8160', 'serum calcium', ' 1s² 2s² 2p⁶ 3s² 3p⁶ 4s²', ' or the same stability (or half-lifetime if they are unstable)']