Au - Gold

A precious metal. Once used only for money and ornimentation, gold has found many uses in modern technology. The free metal is not very reactive and is often found in electronics and micromechanics. Compounds, notably the chloride, are used in archival photoprocessing and analytical chemistry.

Atomic number - 79 Density g/mL 19 .3

Atomic weight u 196 .9665 Melting point K 1337 .58

Bonding radius A 1 .34 Boiling point K 3130

Atomic radius A 1 .79 Heat of vaporization kJ/mol 334 .4

Ionization Potential V 9 .225 Heat of fusion kJ/mol 12 .55

Electronegativity - 2 .54 Specific heat J/gK 0 .128

The oxide is amphoteric.
Crystal are face centered cubic.

Electron config. : [Xe] 4f¹⁴ 5d¹⁰ 6s¹

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

171 a/p,8.600 MeV Ir-167/Pt-170 171.0	172 4 msec a/p,7.100 MeV Ir-168/Pt-171 171.99012	173 59 msec a,6.900 MeV Ir-169 172.98639	174 120 msec a,6.782 MeV Ir-170 173.98491	175 200 msec a/EC,6.778 Ir-171/Pt-175 174.98169	176 1.25 sec a/EC,6.542 Ir-172/Pt-176 175.98024	177 1.18 sec a/EC,8.200 Ir-173/Pt-177 176.97720
178 2.6 sec a/EC,9.600 Ir-174/Pt-178 177.97595	179 7.1 sec a/EC,7.400 Ir-175/Pt-179 178.97326	180 8.1 sec a/EC,8.600 Ir-176/Pt-180 179.97240	181 11.4 sec a/EC,6.300 Ir-177/Pt-181 180.96994	182 15.6 sec a/EC,7.800 Ir-178/Pt-182 181.96961	183 42.0 sec a/EC,5.500 Ir-179/Pt-183 182.96757	184 12.0 sec a/EC,7.100 Ir-180/Pt-184 183.96757
185 4.25 min a/EC,4.710 Ir-181/Pt-185 184.96574	186 10.7 min EC,6.040 MeV Pt-186 185.96591	187 8.4 min a/EC,3.600 Ir-183/Pt-187 186.96456	188 8.84 min EC,5.300 MeV Pt-188 187.96508	189 28.7 min a/EC,2.850 Ir-185/Pt-189 188.96389	190 42.8 min a/EC,4.442 Ir-186/Pt-190 189.96469	191 3.18 hr EC,1.830 MeV Pt-191 190.96364
192 4.94 hr EC,3.516 MeV Pt-192 191.96480	193 17.65 hr EC,1.069 MeV Pt-193 192.96413	193a 3.9 sec EC,1.359 MeV Pt-193 192.96444	194 38.02 hr EC,2.492 MeV Pt-194 193.96533	195 186.10 da EC,1.220 MeV Pt-195 194.96501	196 6.183 da B-/EC,1.506 Hg-196/Pt-196 195.96655	197 100% Stable 196.96655
198 2.69517 da B-,1.372 MeV Hg-198 197.96822	199 3.139 da B-,1.702 MeV Hg-199 198.96874	200 48.4 min B-,2.240 MeV Hg-200 199.97071	201 26 min B-,1.275 MeV Hg-201 200.97165	202 28.8 sec B-,2.950 MeV Hg-202 201.97378	203 60 sec B-,2.139 MeV Hg-203 202.97515	204 39.8 sec B-,3.800 MeV Hg-204 203.97755
205 31 sec B-,3.820 MeV Hg-205 205.0	MASS abund. Halflife Particle, Energy Decay Product(s) Isotopic Mass

Atomic number	-	79		Density	g/mL	19	.3
Atomic weight	u	196	.9665	Melting point	K	1337	.58
Bonding radius	A	1	.34	Boiling point	K	3130
Atomic radius	A	1	.79	Heat of vaporization	kJ/mol	334	.4
Ionization Potential	V	9	.225	Heat of fusion	kJ/mol	12	.55
Electronegativity	-	2	.54	Specific heat	J/gK	0	.128
The oxide is amphoteric.				Crystal are face centered cubic.
Electron config. : [Xe] 4f¹⁴ 5d¹⁰ 6s¹