Periodic Table of Elements: Cadmium

Symbol: Cd Atomic mass: 112.411 u Atomic number: 48 Electron configuration: [Kr] 4d¹⁰5s² Discovered: 1817 Valence: two electrons Group: group 12

Cadmium was discovered in 1817 by a physician, Friedrich Stromeyer (1776-1835). The element was first found in the condensation of vapors (mixed with soot and zinc oxides) that rose out of a furnace in which zinc oxide was being roasted.

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