Homework Due Wednesday, Do Now Please: PLANNER: BRING HEADPHONES TOMORROW Homework Due Wednesday, Choose ONE: Cornell Notes for 11-3 or Question 403 1-10 (If you signed up for Honors for next year you should do both.)

Find Your Division… are you a positive ion are you a negative ion are you an atom

Metal atoms lose electrons. Nonmetal atoms gain electrons. An atom that has gained or lost an electron is an ion. An ionic bond forms between positively and negatively charged ions. Lesson 3 - VS

Ionic Bonds—Electron Transferring 5. When forming a compound, the nonmetal atoms gain the electrons… lost by the metal atoms. 6. The attraction between positively and negatively charged ions in an ionic compound is an ionic bond. Lesson 3-2

Formation of Cations Metals lose electrons to attain a noble gas configuration. Lose electrons means they make positive ions (cations-meow, pawsitive!) Na 1 valence electron Na1+ 8 valence electrons (What noble gas is this like, _____)

Electron Dots For Cations 5. Metals will have few valence electrons 6. Metals will lose the valence electrons 7. Write the electron dot model for calcium.

Electron Dots For Cations Did you draw this? Do metals lose or gain electrons? Ca

Electron Dots For Cations

Electron Dots For Cations 8. When metals lose the valence electrons they form positive ions. So what is the name of this?

Formation of Anions Nonmetals gain electrons to attain a noble gas configuration. Gain electrons means they make negative ions Cl 7 valence electron Cl1- 8 valence electrons (What noble gas is this like, _____)

Metallic Bonds—Electron Pooling A metallic bond is a bond formed when many metal atoms share their pooled valence electrons. Valence electrons in metals are not bonded to one atom. Instead, a “sea of electrons” surrounds the positive ions. Lesson 3-4

4. Valence electrons are free to move among all the aluminum (Al) ions. Lesson 3-4

Elements can join together by sharing, transferring, or pooling electrons to make chemical compounds. The BIG Idea

Which of these describes an atom that is no longer electrically neutral because it has lost or gained valence electrons ? A. covalent compound B. proton C. ion D. molecule Lesson 3 – LR1

What is a bond formed when many metal atoms share their pooled valence electrons? A. ionic bond B. metallic bond C. covalent compound D. ionic compound Lesson 3 – LR2

An ionic bond is the attraction between positively and negatively charged ions in which of these? A. valence electrons B. covalent compound C. ionic compound D. none of these Lesson 3 – LR3

Which term refers to a force that holds two or more atoms together in a compound? A. valence electron B. positive charge C. chemical bond D. negative charge Chapter Review – MC1

Which of these is the outermost electron of an atom that participates in chemical bonding? A. valence electron B. nucleus C. negative electrons D. proton Chapter Review – MC2

Which of these is a group of atoms held together by covalent bonding that acts as an independent unit? A. electron B. proton C. molecule D. valence electrons Chapter Review – MC3

Which of these describes a chemical bond formed when two atoms share one or more pairs of valence electrons? A. polar molecule B. covalent bond C. chemical compound D. none of these Chapter Review – MC4

A metallic bond is a bond formed when many metal atoms share what? A. their pooled valence electrons B. ions C. charged ions D. molecules Chapter Review – MC5

Which of these is a model that represents valence electrons in an atom as dots around the element’s chemical symbol? A. periodic table B. energy level C. atomic number D. electron dot diagram Chapter Review – STP1

Which term describes atoms with unpaired dots in their electron dot diagrams? A. reactive B. chemically unstable C. chemically stable D. A and B Chapter Review – STP2

Which of these describes a group of chemical symbols and numbers that represent the elements and the number of atoms of each element that make up a compound? A. chemical bond B. chemical formula C. covalent bond D. molecule Chapter Review – STP3

Once an atom gains or loses electrons, it becomes which of these? A. charged ion B. covalent compound C. molecule D. proton Chapter Review – STP4

Which of these refers to the attraction between positively and negatively charged ions in an ionic compound? A. metallic bond B. ionic bond C. covalent compound D. none of these Chapter Review – STP5