11/17 - 8th Grade Agenda Learning Objective: Covalent Bonding Collect HW: Reading & Notetaking: p.97 – 99 Textbook Reading p.193-197 HW: Reading & Notetaking p.100 – 101

Daily Reflection Prompt: Write 3 facts about Covalent bonds

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

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

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

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

Ionic Compound – Electrical conductivity

What are three characteristic properties of ionic compounds? Crystal Shape High Melting Points Electrical Conductivity

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

What is a Covalent Bond? A chemical bond formed when two atoms share electrons is called a covalent bond

Examples of Covalent bonds

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

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

Ionic vs Covalent Bond Ionic Bond Covalent Bond

Is Salt (NaCl) a Ionic or Covalent Bond? Ionic Bond

Is Water a Ionic or Covalent Bond?

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

What is a Double Bond? Double Bond is a covalent bond where two pairs of electrons are shared

What is a Triple Bond? Triple Bond is a covalent bond where three pairs of electrons are shared

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?

Polar vs. Non Polar Molecule

Why don’t water and vegetable oil mix? Oil is nonpolar, water is polar. Nonpolar and polar compounds do not mix well together.

When you do laundry, what causes the nonpolar dirt to mix with the polar water? Detergent causes the dirt and water to mix

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

What is the symbol for Gold? Au Someone grabs your gold chain and you say A-u give me back that gold

What is the symbol for Silver? Ag As I Age my hair turns silver

What is the symbol for Sodium? Na Na, I don’t want any salt.

What is the symbol for Potassium? K The first three letters of potassium is pot. Pots are also named Kettles

What is the symbol for Iron? Fe The giant pumping iron says Fe fi fo fum.

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