Do Now If you have not submitted your reference page do so BEFORE the bell rings. You do this by clicking on Submit Assignment, then Resources, then Apps, choose Google Drive, check the box next to your Google Doc and hit Upload. Place your cube on the cart on the respective shelf for your period. Make sure your scoring guide is placed under your cube.

Ion Formation & Element Classification

Learning Targets I can explain why atoms form ions. I can determine the ion formation for the first 20 elements. I can differentiate between a metal, nonmetal and metalloid (semi-conductor).

The Role of Electrons The periodic trends in the periodic table are the result of electron arrangement Chemical properties are determined by valence electrons , which are located in the outermost energy level . Elements in a group have chemical and physical properties in common because they have the same number of valence electrons.

An element’s electron arrangement determines its location in the periodic table

Ions What is an ion? An atom with a charge (+ or -) Why do atoms form ions? To have a filled outermost energy level How does an atom become an ion? Atoms gain or lose e- What electron configuration does an ion possess? Electron configurations of noble gases have a full outer shell = stable 

Octet Rule Elements lose, gain, or share electrons to form the required octet (8) in their highest remaining energy level.

Ion formation How to make Li look like He? LOSE AN ELECTRON! Li He 3p+

Equation of ion formation + Li 3p+ Li 3p+ + Li  Li+ + 1e- CATION = atom with a POSTIVE charge

Ion formation How to make O look like Ne? GAIN 2 ELECTRONS! O Ne 8p+

Equation of ion formation 2- O 8p+ O 8p+ + O + 2e-  O2- ANION = atom with a NEGATIVE charge

How are Elements Classified?

Metals Most of the elements Shiny Malleable can be pounded into thin sheets Conduct heat and electricity Ductile can be stretched into thin wires

Nonmetals Right side of periodic table Dull Brittle Poor conductors of heat and electricity (insulators) Not ductile or malleable Sulfur Graphite

Semiconductors AKA Metalloids Conduct electricity under certain conditions Share properties with metals and nonmetals Ductile and malleable Solids that can be shiny or dull

Learning Target Checkpoint Why do atoms form ions? What is the difference between metals, nonmetals and metalloids?

What Do I Do Now? Complete the Ion Formation Worksheet Use the resources on the teacher webpage to help you Use these Mass Numbers: Beryllium: 9 Boron: 11 Nitrogen: 14 Oxygen: 17 Fluorine: 19