Zinc-plant residue is leached; Cd sponge is cemented onto Zn dust, redissolved in sulfuric acid, and electrowon on aluminum cathodes.
Research Elements Cd · atomic number 48 Transition metal · period 5, group 12 [Kr] 4d10 5s2 Shells: 2, 8, 18, 18, 2 Valence electrons: 2 in the outer shell (5s2), and 10 in 4d10 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).Cadmium
Electrons
How it's obtained
Natural isotopes
Isotope Relative atomic mass Abundance 106Cd 105.9064599(12) 0.0125(6) 108Cd 107.9041834(12) 0.0089(3) 110Cd 109.90300661(61) 0.1249(18) 111Cd 110.90418287(61) 0.1280(12) 112Cd 111.90276287(60) 0.2413(21) 113Cd 112.90440813(45) 0.1222(12) 114Cd 113.90336509(43) 0.2873(42) 116Cd 115.90476315(17) 0.0749(18)