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Why do some metals react violently in water? Lewis Dot Diagrams Chemical Bonding Energy and Electrons Periodic Patterns and Forces of Attraction Density, Solubility and other Review 200 400 600 800 1000 Bonus Question: 2000 pts

Lewis Dot Diagrams : 200 Question: Draw a Lewis Dot Diagram for Ca Answer Ca symbol at the center Ca should have 2 electrons shown as dots Back

Lewis Dot Diagrams : 400 Question: Draw correct lewis dot diagrams for Cl, Al and He Answer Cl should have 7 electrons as dots Al should have 3 electrons as dots He should have 2 electrons as dots Back

Lewis Dot Diagrams : 600 Question: Draw the Lewis Dot Diagrams for the ION form of Ca and Cl Answer Ca should have no dots and a +2 charge (+20 protons and -18 electrons = +2 charge) Cl should have 8 dots and a -1 charge (+17 protons and -18 electrons = -1 charge) Back

Lewis Dot Diagrams : 800 Question: Draw the lewis dot diagram of the Ionic bond between Ca and Cl Answer All electrons by Cl (2 Cl atoms) Cl on either side of Ca (Ca in the center) Ca has no electrons Cl has -1 charge Ca has +2 charge Back

Lewis Dot Diagrams : 1000 Question: Draw a lewis dot diagram for the bond CO2 Electrons must be shown with correct sharing Answer: C in the center, 1 O on each side Double bond with C and O, 4 electrons in between each C and O Back

Chemical Bonding 200 Question: Does this picture show an ionic or covalent bond? Answer Conduction Back

Chemical Bonding 400 Question: Does this picture show an ionic or covalent bond? Answer Radiation or convection depending on answer Back

Chemical Bonding 600 Question: Draw a bond between at least 2 atoms and label how the features in the drawing correctly represent the bond type Answer Ionic Bond Charges, brackets, electrons on non-metal Covalent Bond Circles to share, electrons between and arround Back

Chemical Bonding : 800 Question: Describe how you can tell if a bond is polar covalent or non-polar covalent. Use ionization energy or electronegativity in your response. Answer Similar electronegativity then share One is stronger than the other it is polar Back

Chemical Bonding 1000 Question: Describe why elements in Ionic bonds steel or lose electrons where as elements in Covalent bonds share. Use evidence from periodic table patterns to support your claim. Answer Ionic forms when electronegativities are VERY different Covalent form when they are somewhat similar Back

Energy and Electrons : 200 Question: Most metals will ________ electrons when forming a bond with a non-metal. (bonus 100 points if you can say why) Answer Lose bccause they have a weak attraction to their electrons (low ionization energy) Back

Energy and Electrons : 400 Question: What happens to the electrons of a non-metal in an ionic bond? Answer Nothing, or they increase, b/c they steel the metals electrons Back

Energy and Electrons : 600 Question: What happens to Electrons transferred within an atom, between orbital shells? Answer Energy is absorbed and emitted (heat and light energy) Back

Energy and Electrons : 800 Question: What happens when electrons are transferred between atoms or ions? Answer A bond is broken or formed Back

Energy and Electrons 1000 Question: Draw a picture of Electrons being transferred between Calcium and water. Answer Calcium replaces H O steels Ca electrrons Back

Periodic Patterns and Forces of Attraction : 200 Question: The ________ in the periodic table tells you how many electron shells an atoms has. Answer Period or row Back

Periodic Patterns and Forces of Attraction 400 Question: The group tells you __________ about an atom. Answer Number of Valence (outer) shell electrons Back

Periodic Patterns and Forces of Attraction 600 Question: Describe how the atomic radius changes as you move down the periodic table. (Bonus 200 points if you also describe how it changes as you move across the periodic table, relating protons) Answer Down – increases Right – decreases (though more protons holds electrons closer) Back

Periodic Patterns and Forces of Attraction : 800 Question: Describe how Ionization energy changes as you move to the right on the periodic table AND as you move down on the periodic table Answer Right – Ionization energy increases Down – Ionization energy descreases Back

Periodic Patterns and Forces of Attraction 1000 Question: Describe why atoms with a lower ionization energy are more likely to lose their electrons while atoms with higher ionization energy are more likely to gain electrons? Answer Lower ionization energy – typically have fewer protons and more shells making the forces of attraction less between the electrons and protons, making them easier to lose Back

Density, Solubility and other Review : 200 Question: Why does a gas rise out of water? Answer Because it is less dense than water Back

Density, Solubility and other Review : 400 Question: Why do a metal and a non-metal attract to each other if, as ions, they have full outer shells? (Draw Na and Cl if it helps you) Answer They have opposite charges which are attracted Na loses (becomes more positive) Cl gains (becomes more negative) Back

Density, Solubility and other Review : 600 Question: Water is polar covalent, meaning it has both a negative and a positive charge. Why does water have a polar bond? Answer Oxygen is more electronegative (greater ability to hold onto electrons) than Hydrogen Back

Density, Solubility and other Review 800 Question: Water is polar covalent, meaning it has both a negative and a positive charge. Why do Ionic and polar bonds dissolve in water? Answer The opposite charges will attract allowing the substance to say with the water, breaking from it’s other charged bond, or dissolve Back

Density, Solubility and other Review : 1000 Question: Explain why Hydrogen gas doesn’t dissolve in water and then rises to the surface? Answer Rises because it is less dense Doesn’t dissolve because Non-polar covalent Hydrogen gas Polar covalent Water Charges are not attracted to each other so nothing stays attracted/attached Back

Bonus Question: 2000 pts. Question: Describe how the forces of attraction within an atom, between protons and electrons, influence the bond that forms between atoms. Use ionic or covalent bonds to explain Must includes: Ionization energy Electronegativity Electron shells protons Back

Daily Double Write Down How Much Money You Are Willing To Risk If You get the Question write you win that money If you get it wrong you Loss the money!

Daily Double Write Down How Much Money You Are Willing To Risk If You get the Question write you win that money If you get it wrong you Loss the money!