Locate the nearest noble gas preceding each element and identify the principal quantum number of the valence shell of each element. Identify the block in the periodic table to which the group 2 elements belong.Use the periodic table to predict the valence electron configuration of all the elements of group 2 (beryllium, magnesium, calcium, strontium, barium, and radium).Īsked for: valence electron configurations For elements after No, the electron configurations are tentative. The electron configurations of the elements indicated in blue are also anomalous, but the reasons for the observed configurations are more complex. The electron configurations of elements indicated in red are exceptions due to the added stability associated with half-filled and filled subshells. \( \newcommand\): Electron Configurations of the Elements.
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