Pt - Platinum

	Atomic number	-	78			Density	g/mL	21	.4
	Atomic weight	u	195	.09		Melting point	K	2045
	Bonding radius	A	1	.3		Boiling point	K	4100
	Atomic radius	A	1	.83		Heat of vaporization	kJ/mol	510
	Ionization Potential	V	9			Heat of fusion	kJ/mol	19	.6
	Electronegativity	-	2	.28		Specific heat	J/gK	0	.13
	The oxide is mildly basic.					Crystal are face centered cubic.
	Electron config. : [Xe] 4f14 5d9 6s1
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H

He

Li

Be

B

C

N

O

F

Ne

Na

Mg

Al

Si

P

S

Cl

Ar

K

Ca

Sc

Ti

V

Cr

Mn

Fe

Co

Ni

Cu

Zn

Ga

Ge

As

Se

Br

Kr

Rb

Sr

Y

Zr

Nb

Mo

Tc

Ru

Rh

Pd

Ag

Cd

In

Sn

Sb

Te

I

Xe

Cs

Ba

La*

Hf

Ta

W

Re

Os

Ir

Pt

Au

Hg

Tl

Pb

Bi

Po

At

Rn

Fr

Ra

Ac**

Rf

Db

Sg

Bh

Hs

Mt

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111

112

113

Lanthanides*

Ce

Pr

Nd

Pm

Sm

Eu

Gd

Tb

Dy

Ho

Er

Tm

Yb

Lu

Actinides **

Th

Pa

U

Np

Pu

Am

Cm

Bk

Cf

Es

Fm

Md

No

Lr

Isotopes of Pt: Click mass number for decay process, product for element page.

168 a,6.991 MeV Os-164 167.98808	169 2.5 msec a,6.840 MeV Os-165 168.98647	170 6 msec a,6.704 MeV Os-166 169.98232	171 25 msec a/EC,6.610 Os-167/Ir-171 170.98110	172 0.104 sec a/EC,6.465 Os-168/Ir-172 171.97729	173 342 msec a/EC,6.350 Os-169/Ir-173 172.97650	174 0.90 sec a/EC,6.184 Os-170/Ir-174 173.97281
175 2.52 sec a/EC,6.179 Os-171/Ir-175 174.97230	176 6.33 sec a/EC,5.100 Os-172/Ir-176 175.96899	177 11 sec a/EC,6.800 Os-173/Ir-177 176.96843	178 21.1 sec a/EC,4.300 Os-174/Ir-178 177.96575	179 21.2 sec a/EC,5.700 Os-175/Ir-179 178.96532	180 52 sec a/EC,3.700 Os-176/Ir-180 179.96320	181 51 sec a/EC,5.200 Os-177/Ir-181 180.96317
182 2.2 min a/EC,2.850 Os-178/Ir-182 181.96126	183 6.5 min a/EC,4.600 Os-179/Ir-183 182.96172	184 17.3 min a/EC,2.300 Os-180/Ir-184 183.95989	185 70.9 min a/EC,3.800 Os-181/Ir-185 184.96068	186 2.0 hr a/EC,1.380 Os-182/Ir-186 185.95943	187 2.35 hr EC,3.110 MeV Ir-187 186.96069	188 10.2 da a/EC,2.809 Os-184/Ir-188 187.95939
189 10.87 hr EC,1.971 MeV Ir-189 188.96083	190 0.01% 6.5E11 yr a,3.249 MeV Os-186 189.95992	191 2.802 da EC,1.019 MeV Ir-191 190.96168	192 0.79% Stable 191.96103	193 50 yr EC,1.140 MeV Ir-193 192.96298	194 32.9% Stable 193.96266	195 33.8% Stable 194.96477
196 25.3% Stable 195.96493	197 19.8915 hr B-,2.270 MeV Au-197 196.96732	198 7.2% Stable 197.96787	199 30.80 min B-,1.702 MeV Au-199 198.97057	200 12.5 hr B-,7.200 MeV Au-200 199.97142	201 2.5 min B-,2.660 MeV Au-201 200.97451	202 44 hr B-,6.880 MeV Au-202 202.0
MASS abund. Halflife Particle, Energy Decay Product(s) Isotopic Mass

Updated by clh on 2/6/98. This is not a publication of Phoenix College.