Einsteinium

ACTINOID · GROUP None · PERIOD 7

Einsteinium

252

Atomic Data

[Rn] 5f¹¹ 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	11	89
P	6	6s	2	91
P	6	6p	6	97
Q	7	7s	2	99
Total			99	99

Einsteinium has two naturally occurring stable isotopes. The most abundant is ²⁵²Es, comprising None% of all naturally occurring Einsteinium.

Isotope	Symbol	Protons	Neutrons	Abundance	Stability
Einsteinium-252	²⁵²Es	99	153	trace	Stable
Einsteinium-253	²⁵³Es	99	154	trace	Stable

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

Einsteinium

None ppm

Silicon (ref.)

277,000 ppm

Oxygen (ref.)

461,000 ppm

Einsteinium

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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