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WARM UP Brainstorm about the following… You may do one, or all three. Molecules Atoms Building Blocks
of Life
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
6
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
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
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 -)
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
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