Curium

ACTINOID · GROUP None · PERIOD 7

Curium

247

Atomic Data

[Rn] 5f⁷ 6d¹ 7s²

Shell	n	Subshell	Electrons	Cumulative
K	1	1s	2	2
L	2	2s	2	4
L	2	2p	6	10
M	3	3s	2	12
M	3	3p	6	18
M	3	3d	10	28
N	4	4s	2	30
N	4	4p	6	36
N	4	4d	10	46
N	4	4f	14	60
O	5	5s	2	62
O	5	5p	6	68
O	5	5d	10	78
O	5	5f	7	85
P	6	6s	2	87
P	6	6p	6	93
P	6	6d	1	94
Q	7	7s	2	96
Total			96	96

Curium has two naturally occurring stable isotopes. The most abundant is ²⁴⁴Cm, comprising None% of all naturally occurring Curium.

Isotope	Symbol	Protons	Neutrons	Abundance	Stability
Curium-244	²⁴⁴Cm	96	148	trace	Stable
Curium-247	²⁴⁷Cm	96	151	trace	Stable

Curium is present in Earth's crust at approximately trace amounts by mass and at approximately trace amounts by mass throughout the universe.

Curium

None ppm

Silicon (ref.)

277,000 ppm

Oxygen (ref.)

461,000 ppm

Curium

None ppm

Helium (ref.)

230,000 ppm

Hydrogen (ref.)

739,000 ppm

Free periodic table reference sheets for classrooms, study sessions, and laboratory use.

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