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

of Life

TODAYS AGENDAClass BusinessFinish Video

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

Warm UpList everything you know

about the periodic table. Guess if youneed too.

Do not list Elements

Agenda1. 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 40-50 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 2-1

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CCarbon12.011

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 MatterChapter 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

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Section 2-1

An Element in the Periodic Table

Go to Section:

Nonradioactive carbon-12 Nonradioactive carbon-13 Radioactive carbon-14

6 electrons6 protons6 neutrons

6 electrons6 protons8 neutrons

6 electrons6 protons7 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– H2

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