Methods of predicting the arrangement and location of electrons in atoms Electron Arrangement.

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Presentation transcript:

Methods of predicting the arrangement and location of electrons in atoms Electron Arrangement

A. Lewis Dot Structures zvalence electrons – e – in an atom’s outermost orbitals (in highest energy level) available for bonding; determine the chemical properties of an element zelectron-dot structure – consists of element’s symbol surrounded by dots that represent the atom’s valence e –

© 1998 by Harcourt Brace & Company s p d (n-1) f (n-2) B. Electron Congifuration

C. Johannesson S 16e - Valence Electrons Core Electrons 1s 2 2s 2 2p 6 3s 2 3p 4 C. Notations zLonghand Configuration

zShorthand Configuration yGo up one row and over to the Noble Gas. yFill in the remaining e - in each sublevel like normal. S16e - [Ne] 3s 2 3p 4

[Ar]4s 2 3d 10 4p 2 zExample - Germanium

White Board Examples zHelium (He) zFluorine (F) zNitrogen (N) zAluminum (Al) zSulfur (S)

Homework zDo the Lewis dot structure and long and short hand electron configuration for the following elements: yMagnesium (Mg) ySilver (Ag) yGold (Au) yBromine (Br) yEuropium (Eu)