WARM UP Brainstorm about the following… You may do one, or all three. Molecules Atoms Building Blocks of Life

TODAYS AGENDA Class Business Finish Video

Today’s Assignment 10 Facts or Questions from the Video Discussion at the end of class.

Warm Up List everything you know about the periodic table. Guess if you need too. Do not list  Elements

Agenda 1. Warm Up 2. CB 3. Matter: What is it? Activity – Complete in the front of your notebook. Stamped at the end of class. 2pts in your notebook

CB Make up Quizzes this week O. 2-2 and 2-3 Should be complete by the end of this week or you will be very far behind for progress reports next week. Notebooks collected next week for 5 week grade. Should be worth around pts  About 20% of your grade

LETS PRACTICE! Practice makes permanent, not perfect Complete the worksheet in your NB If you finish early, work on homework Rules:  Ask three before me (Mr. Hagen)  Do not let the next table overhear your conversation  If I (Mr. Hagen) can speak in a normal tone, the class should be able to hear me.

Homework All previous assignments will not be collected after next week. Outline 2-2 and 3 are due for full credit on or before Friday Quiz on 2-1 on Friday House tonight, Fox, 8/9pm

WARM UP Draw and label the Atomic Number and Atomic Mass for the element Carbon from the periodic table.  Refer to the back of the book Draw and label the Proton, Neutron, and Electron for an atom of Helium  Refer to the Section C Carbon

Modern Atomic Theory Elements are composed of atoms, which are extremely small. All atoms of a given element have the same chemical properties and contain the same number of protons. Compounds are formed by the chemical combination of two or more different kinds of atoms. (Whole numbers only) Atoms are the units of chemical change

The Nature of Matter Chapter 2-1

What’s the matter? MATTER: –Anything that has mass and occupies space. –What is matter made of?

What’s the “matter”? Phases –Solid –Liquid –Gas Physical properties versus chemical properties –Think about burning paper

Atom The basic unit of all matter Made up of 3 parts: Protons (positive) Neutrons (neutral) Electrons (negative) Atomic number –# of protons Atomic mass –# of protons + neutrons

Elements A pure substance that contains only one type of atom. –Hydrogen –Oxygen –Carbon –Iron What is the difference between one element and another? –Each has a specific # of Protons

Periodic Table A whole bunch of different elements

6 C Carbon Section 2-1 An Element in the Periodic Table Go to Section:

Nonradioactive carbon-12Nonradioactive carbon-13Radioactive carbon-14 6 electrons 6 protons 6 neutrons 6 electrons 6 protons 8 neutrons 6 electrons 6 protons 7 neutrons Section 2-1 Figure 2-2 Isotopes of Carbon Go to Section:

Atoms versus Ions Atoms have equal amounts of protons and electrons –Therefore, the net charge is ZERO Ions have same number of protons, but more or less electrons –Therefore, it will have a net charge (+ or -)

Molecules When atoms join together, they form molecules Smallest unit of compounds –H 2

Compounds and Bonding Compound –A combination of two or more elements Bonds –Bonds hold two or more elements together to form a compound

Types of Bonds Ionic Bond –When electron(s) are transferred from one element to another (One element gives electrons to the other element) –Makes IONS and they are attracted to each other. Covalent Bond –When two elements share electrons

Ionic Bond

Covalent Bond

Review Atoms are the basic units of __________ An Ion of Sodium (Na) that has 11 protons, but only 10 electrons will have a (positive/negative) charge What is the type of bond in which electrons are shared by two elements? A molecule must contain at least _______ atoms.

WARM UP Answer the following questions in 2-3 complete sentences. What are the two types of bonds?  Explain the difference between the two. What are Van der Waals Forces? Refer to 2-1 pages 38-39

CB

Molecular Model Kits