Dissolved in aqua regia, precipitated as (NH4)2PtCl6, and ignited in air to Pt sponge.
Research Elements Pt · atomic number 78 Transition metal · period 6, group 10 [Xe] 4f14 5d9 6s1 Shells: 2, 8, 18, 32, 17, 1 Valence electrons: 1 in the outer shell (6s1), and 9 in 5d9 Green dots are the outer shell's s and p electrons. Softer green dots are the d electrons of transition metals, and the d and f electrons of lanthanides and actinides: they often take part in bonding, but not always. Grey dots are the core. Ground-state configuration from the NIST Atomic Spectra Database (A. Kramida, Yu. Ralchenko, J. Reader and the NIST ASD Team). Abundance is the mole fraction of the element found as that isotope on Earth; digits in parentheses are the uncertainty in the last digits. Masses and abundances from NIST, Atomic Weights and Isotopic Compositions (J. S. Coursey, D. J. Schwab, J. J. Tsai and R. A. Dragoset, National Institute of Standards and Technology).Platinum
Electrons
How it's obtained
Natural isotopes
Isotope Relative atomic mass Abundance 190Pt 189.9599297(63) 0.00012(2) 192Pt 191.9610387(32) 0.00782(24) 194Pt 193.9626809(10) 0.3286(40) 195Pt 194.9647917(10) 0.3378(24) 196Pt 195.96495209(99) 0.2521(34) 198Pt 197.9678949(23) 0.07356(130)