Electron Dot Diagrams and Ions Chapter 4 Part 2

Electron Dot Diagrams Show ONLY outer level electrons, or valence e- Also called Lewis diagrams 1. Begin with the element’s symbol 2. Use the PT to determine the number of outer level electrons 3. Place up to 2 dots per side for a total of up to 8 electrons Put the first 2 dots together on one side, then put single dots on the remaining sides until you have to pair them

Electron Dot Diagrams Ex: 1 electron X

Electron Dot Diagrams Ex: 2 electrons X

Electron Dot Diagrams Ex: 3 electrons X Choose a clockwise or counterclockwise direction and fill empty sides with an electron before pairing any electrons.

Electron Dot Diagrams Ex: 4 electrons X Choose a clockwise or counterclockwise direction and fill empty sides with an electron before pairing any electrons.

Electron Dot Diagrams Ex: 5 electrons X Choose a clockwise or counterclockwise direction and fill empty sides with an electron before pairing any electrons.

Electron Dot Diagrams Ex: 6 electrons X Choose a clockwise or counterclockwise direction and fill empty sides with an electron before pairing any electrons.

Electron Dot Diagrams Ex: 7 electrons X Choose a clockwise or counterclockwise direction and fill empty sides with an electron before pairing any electrons.

Electron Dot Diagrams Ex: 8 electrons X THIS IS THE MOST ELECTRONS THAT EVER ARE INCLUDED IN ELECTRON DOT DIAGRAMS.

Electron Dot Diagrams Time to practice what you’ve learned For the following elements, create electron dot diagrams. aluminumpotassiumargonoxygen phosphorussiliconbariumiodine

CHEMICAL BONDING The number of electrons in the ____________ energy level determines whether an atom will form bonds. These electrons are also called ___________ electrons. Atoms bond to get a ________ outer level. For all E levels beyond the first, the outermost E level is considered to be full if it contains ______ (#) electrons. The first E level is full with ____ (#) electrons. Why are noble gases nonreactive?

IONS Chem 4 Kids example METALS have a low/high number of valence electrons. metals lose/gain electrons when bonding. form positive/negative ions. NONMETALS have a low/high number of valence electrons. lose/gain electrons when bonding. form positive/negative ions. ions end in –ide

IONS- Practice aluminum potassium argon oxygen phosphorus silicon barium iodine Write the ions formed by the elements.