Bell work: Bohr Diagrams/ Lewis Dot Basics In your notebooks, draw the Bohr diagrams and Lewis Dot Structures for the first twenty elements. Show them to your teacher when completed.

Bonding A ________ _______ is the electrical force that links atoms together. Bonding occurs when valence electrons move around. Elements can bond in three ways: Covalent Bond Ionic Bond Metallic Bond

Covalent Bonds As the attractions bring the atoms together, electrons from each atom are attracted to the nucleus of both atoms, which “share” the electrons.

Covalent Bonds The sharing of electrons between nonmetal atoms is called a ____________, which holds the atoms together as a molecule. Three types of bonds: Single Double Triple

Covalent Bonds If each atom has room for an electron in its outer __________ shell and there is a strong attraction of both nonmetal atoms, a covalent bond will result.

Nonmetal atoms will covalently bond until their outer valence shell is _______. Nonmetal atoms, covalently bonded as a molecule, are ________than they were as separate atoms.

Types of Covalent Bonds Valence electrons that are EQUALLY shared between atoms are known as ________________________

Types of Covalent Bonds Shared valence electrons that are more attracted to one atom over another is called a _______________

Other definitions Molecule-neutral group of atoms united by covalent bond Compound-neutral group of ions united by an ionic bond

Ionic Bonding When an atom loses or gains an electron, it is called an ___________. An _________ ________ is a positive ion and a negative ion joining together by TRANSFERRING electrons.

A ______ is a charged atom that has lost one or more electrons. The result is a positive charge. An ________ is a charged atom that has gained one or more electrons. The result is a negative charge.

Ionic Bonding The attractions between the protons and electrons of atoms can cause an electron to move completely from one atom to the other. Ionic Bonds are made between _________ elements and ___________ elements

Ionic Bonding Examples

Oxidation Number The _______________ ______________ is the total number of electrons that an atom either gains (-) or loses (+) in order to form a chemical bond with another atom.

http://www.nbclearn.com/portal/site/learn/chemistry-now/how-atoms-bond

Metallic Bonding The ______________ ___________ is chemical bonding that holds the atoms of a metal together.

Covalent Bonding vs. Ionic Bonding

Ionic vs. Covalent Bonding

Vocabulary Valence Electrons Octet Rule Bohr Model Chemical Bond Covalent Bond Nonpolar Covalent Bond Polar Covalent Bond Ionic Bond Cation Anion Oxidation Number Metallic Bond