Neodymium

LANTHANOID · GROUP None · PERIOD 6

Neodymium

144.24

Atomic Data

[Xe] 4f⁴ 6s²

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	4	50
O	5	5s	2	52
O	5	5p	6	58
P	6	6s	2	60
Total			60	60

Neodymium has seven naturally occurring stable isotopes. The most abundant is ¹⁴²Nd, comprising 27.2% of all naturally occurring Neodymium.

Isotope	Symbol	Protons	Neutrons	Abundance	Stability
Neodymium-142	¹⁴²Nd	60	82	27.2	Stable
Neodymium-143	¹⁴³Nd	60	83	12.2	Stable
Neodymium-144	¹⁴⁴Nd	60	84	23.8	Stable
Neodymium-145	¹⁴⁵Nd	60	85	8.3	Stable
Neodymium-146	¹⁴⁶Nd	60	86	17.2	Stable
Neodymium-148	¹⁴⁸Nd	60	88	5.7	Stable
Neodymium-150	¹⁵⁰Nd	60	90	5.6	Stable

Neodymium is present in Earth's crust at approximately 41 ppm by mass and at approximately 0.6 ppm by mass throughout the universe.

Neodymium

41 ppm

Silicon (ref.)

277,000 ppm

Oxygen (ref.)

461,000 ppm

Neodymium

0.6 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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