Platinum

TRANSITION METAL · GROUP 10 · PERIOD 6

Platinum

195.08

Atomic Data

[Xe] 4f¹⁴ 5d⁹ 6s¹

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	9	77
P	6	6s	1	78
Total			78	78

Platinum has six naturally occurring stable isotopes. The most abundant is ¹⁹⁵Pt, comprising 33.832% of all naturally occurring Platinum.

Isotope	Symbol	Protons	Neutrons	Abundance	Stability
Platinum-190	¹⁹⁰Pt	78	112	0.012	Stable
Platinum-192	¹⁹²Pt	78	114	0.782	Stable
Platinum-194	¹⁹⁴Pt	78	116	32.967	Stable
Platinum-195	¹⁹⁵Pt	78	117	33.832	Stable
Platinum-196	¹⁹⁶Pt	78	118	25.242	Stable
Platinum-198	¹⁹⁸Pt	78	120	7.163	Stable

Platinum is present in Earth's crust at approximately 0.005 ppm by mass and at approximately 0.5 ppm by mass throughout the universe.

Platinum

0.005 ppm

Silicon (ref.)

277,000 ppm

Oxygen (ref.)

461,000 ppm

Platinum

0.5 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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