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11/17 - 8th Grade Agenda Learning Objective: Covalent Bonding
Collect HW: Reading & Notetaking: p.97 – 99 Textbook Reading p HW: Reading & Notetaking p.100 – 101
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Daily Reflection Prompt: Write 3 facts about Covalent bonds
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Meaning of Subscript & Superscript
ctrons A subscript tells you the ratio of ele_______ in the comp________ If no subscript is written, the number 1 is understood. MgCl2 = 1 Magnesium ion and 2 Chloride ions ound
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Properties of Ionic Compounds
In general ionic compounds are hard, bri______, solids with high melting points. When melted or dissolved in water, they conduct ele_______ current. ttle ctric
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Ionic Crystal aces erns
Ionic crystals are ions with sharp edges, corners, flat surf______. They have a cubic shape because of the patt______ formed by the compound aces erns
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What is a orderly, three dimensional pattern of ions or atoms in a solid called?
Crystals Why do Crystals form patterns of particle? Tightly bonded negative and positive ions
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Ionic Compound – Electrical conductivity
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What are three characteristic properties of ionic compounds?
Crystal Shape High Melting Points Electrical Conductivity
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Covalent Bond Chemical bond formed when two atoms sha_____ electron is called a covalent bond. Covalent bonds usually form between atoms of nonme_____ In contrast, ionic bonds form when metal and nonmetal combine re tal
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What is a Covalent Bond? A chemical bond formed when two atoms share electrons is called a covalent bond
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Examples of Covalent bonds
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What are the characteristics of Molecular Compounds (Covalent Bonds)
Lower melting point that Ionic compounds Lower boiling point that Ionic compounds Poor conductors of electricity
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What is a difference between an Ionic Bond and a Covalent Bond?
In an Ionic Bond, Chemical bond is formed by atoms loose electrons and becoming ions In Covalent Bond, chemical bond is formed when atoms share electrons
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Ionic vs Covalent Bond Ionic Bond Covalent Bond
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Is Salt (NaCl) a Ionic or Covalent Bond?
Ionic Bond
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Is Water a Ionic or Covalent Bond?
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What are the characteristics of Molecular Compounds (Covalent Bonds)
Lower melting point that Ionic compounds Lower boiling point that Ionic compounds Poor conductors of electricity
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What is a Double Bond? Double Bond is a covalent bond where two pairs of electrons are shared
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What is a Triple Bond? Triple Bond is a covalent bond where three pairs of electrons are shared
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Polar Molecule - Water What is the charge of the Hydrogen side of the molecule? What is the charge of the Oxygen side of the molecule?
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Polar vs. Non Polar Molecule
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Why don’t water and vegetable oil mix?
Oil is nonpolar, water is polar. Nonpolar and polar compounds do not mix well together.
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When you do laundry, what causes the nonpolar dirt to mix with the polar water?
Detergent causes the dirt and water to mix
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Elements derived from Latin
English Name Symbol Latin Name gold Au aurum iron Fe ferrum lead Pb plumbum mercury Hg hydrargyrum potassium K kalium silver Ag argentum sodium Na natrium tin Sn stannum
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What is the symbol for Gold?
Au Someone grabs your gold chain and you say A-u give me back that gold
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What is the symbol for Silver?
Ag As I Age my hair turns silver
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What is the symbol for Sodium?
Na Na, I don’t want any salt.
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What is the symbol for Potassium?
K The first three letters of potassium is pot. Pots are also named Kettles
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What is the symbol for Iron?
Fe The giant pumping iron says Fe fi fo fum.
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Symbols you need to know for the Test
H = Hydrogen He= Helium Li = Lithium Be = Beryllium B = Boron C = Carbon N = Nitrogen O = Oxygen Na = Sodium K= Potassium Fe = Iron Ag = Silver Au = Gold
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