1. Welcome Back Lets review for our test!

2. 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

3. 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
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4. 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
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5. 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)
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6. 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
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7. 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
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8. Chemical Bonding 200 Question:
Does this picture show an ionic or covalent bond?
Answer
Conduction
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9. Chemical Bonding 400 Question:
Does this picture show an ionic or covalent bond?
Answer
Radiation or convection depending on answer
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10. 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
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11. 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
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12. 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
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13. 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)
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14. 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
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15. 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)
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16. Energy and Electrons : 800 Question:
What happens when electrons are transferred between atoms or ions?
Answer
A bond is broken or formed
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17. Energy and Electrons 1000 Question:
Draw a picture of Electrons being transferred between Calcium and water.
Answer
Calcium replaces H
O steels Ca electrrons
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18. 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
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19. Periodic Patterns and Forces of Attraction 400
Question:
The group tells you __________ about an atom.
Answer
Number of Valence (outer) shell electrons
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20. 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)
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21. 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
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22. 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
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23. Density, Solubility and other Review : 200
Question:
Why does a gas rise out of water?
Answer
Because it is less dense than water
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24. 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)
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25. 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
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26. 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
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27. 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
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28. 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
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29. 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!

30. 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!