chemistry december 17, 2014 chemical bonds. science starter pick up from back table 3 minutes you...
TRANSCRIPT
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CHEMISTRYDecember 17, 2014
CHEMICAL BONDS
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SCIENCE STARTER
•PICK UP FROM BACK TABLE•3 MINUTES• YOU ARE SILENT AND
SEATED
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IMPORTANT DATES
• TODAY – Final day for any outstanding homework
• THURSDAY – Lab• FRIDAY – Quiz
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AIM
• What type of bond exists between NaCl?
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VOCABULARIES
• COVALENT BOND• IONIC BOND• DIATOMIC ATOMS• METALLIC BOND
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COVALENT BOND
• bond in which one or more pairs of electrons are shared by two atoms
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IONIC BOND
• bond in which one or more pairs of electrons are removed and attached to another atom, resulting in cations and anions which attract each other.
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BONDING RULES
• COVALENT BOND–BONDING BETWEEN TWO NONMETALS
• IONIC BOND–BONDING BETWEEN A METAL AND A
NONMETAL
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DIATOMIC ATOMS
• atoms comprising of 2 atoms comprising of the same element.
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7 DIATOMIC ATOMSHAVE NO FEAR OF ICY COLD BEAR
• HYDROGEN• NITROGEN• FLUORINE• OXYGEN• IODINE• CHLORINE• BROMINE
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METALLIC BOND
• bond in which the metals atoms move freely in all directions, given rise to “positive ions in a sea of electrons”
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IONIC BONDSCompound Lewis Dot StructureKBr
CaCl2
LiF
MgI2
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COVALENT BONDSCompounds Lewis Dot Structure
NH3
N2H4
N2H2
F2
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QUESTION 1
• What is the difference between an ionic bond and a covalent bond?
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ANSWER 1
The main difference between a covalent bond and an ionic bond is that in an ionic bond, one or more electrons are removed and attached to another atom while in a covalent bond, one or more pairs of electrons are shared by two atoms
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QUESTION 2
• What charge will a Group 2 cation have?
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ANSWER 2
• +2
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QUESTION 3
• What charge will a Group 16 anion have?
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ANSWER 3
• -2
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QUESTION 4
• What charge will a Group 15 anion have?
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ANSWER 4
• -3
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QUESTION 5
• What is the total number of valence electrons for KBr?
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ANSWER 5
• 8
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QUESTION 6
• What is the total number of valence electrons for F2
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ANSWER 6
• 14
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QUESTION 7
• Predict whether ionic or covalent if the following elements bond with oxide.
• Sodium• Magnesium• Aluminum• Silicon• Phosphorus• Sulfur
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ANSWER 7
• Sodium• Magnesium• Aluminum• Silicon• Phosphorus• Sulfur
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AIM PROMPT
• WRITE YOUR RESPONSE TO THE AIM PROMPT• What type of bond exists between NaCl?
State your claim and provide evidence