Presentation on theme: "Do Now Find the number of valence electrons in the following elements: Sodium (Na) Magnesium (Mg) Aluminum (Al)"— Presentation transcript:
Do Now Find the number of valence electrons in the following elements: Sodium (Na) Magnesium (Mg) Aluminum (Al)
PRESENT YOUR FINDINGS! Let’s put ourselves in order – from alkali metals to noble gases What do we notice?
WHY DO I CARE? Why do I care how many valence electrons there are? BONDING! …And it’s going to help us do this:
Lewis Dot Structures That’s right….Lewis Dot Structures Key Point #1: Lewis Dot structures only show the number of valence electrons in an atom Valence electrons are the only electrons involved in bonding Valence electrons are the most important electrons
Drawing Lewis Dot Structures (1) Write element symbol (2) Determine number of valence electrons (3) Place single dot on right side and add dots one at a time counterclockwise. Ex.
How many valence electrons in sodium?
How many valence electrons in neon?
LET’S PRACTICE! Each person will receive 8 M&Ms NO EATING UNTIL WE ARE DONE WITH PRACTICE When I put an element on the board, you must create the Bohr model for that element using your M&Ms to represent electrons When we are done with practice, you can feel free to eat your candy.
How many valence electrons in boron? Draw the following independently in your notes, and then we will come back together to review. These will be graded as your exit ticket – you will turn them in Boron Neon Fr
If we have time….. You may begin your review packet for the exam
HOMEWORK Review packet Due on Wednesday With parent signature