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Review Activity 8 th Grade Science T. Trimpe 2008

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Presentation on theme: "Review Activity 8 th Grade Science T. Trimpe 2008"— Presentation transcript:

1 Review Activity 8 th Grade Science T. Trimpe 2008 http://sciencespot.net/

2 1. Complete the chart using your knowledge of atoms. Vocab Review 1 – What do we call the electrons in the outermost energy level? 2 – What term refers to an atom that has lost or gained electrons? 3 – What is a cation? 4 – What is an anion? Valence Electrons Ions A positively charged ion A negatively charged ion

3 2. Ionic Bonds - Draw the Lewis structures for each atom, draw arrows to show the transfer of electrons, write the charge for each ion, and then write the chemical formula. (A) Potassium + Iodine(B) Magnesium + Oxygen (C) Lithium + Nitrogen

4 3. Covalent Bonds – Draw the Lewis structures for each atom, draw circles to show the electrons that are shared, and then write the bond structure and chemical formula. (A) Fluorine + Fluorine (B) 3 Hydrogen + 1 Phosphorus (C) 2 Hydrogen + 1 Sulfur


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