Chapter 6- Lesson 2 Structure of an Atom

[Pages:16]Chapter 6- Lesson 2 Structure of an Atom

? These notes get copied into notebook pages 30 and 32 for periods 1,3,5,7 and on 28 and 30 for periods 2 and 4

? Please read pgs 212-218 ? Workbooks should have been completed 202-203 and reviewed in

class. ? Lesson 2 Vocab from pg 212 goes on Notebook pg 29 for periods

1,3,5,7 and in notebook pg 27 for periods 2 and 4 ? Look through notes for things that also will go in notebook ? Make sure you come up with 3 questions on all your note pages

The Parts of an Atom

Lesson 2-1

? Atoms are made of several types of tiny particles.

? The number of each of these particles in an atom is what makes atoms different from each other.

The Parts of an Atom (cont.)

Lesson 2-1

This model is copied into notebook pg 29 for periods 1,3,5,7 and on 27 for periods 2 and 4

The Parts of an Atom (cont.)

Lesson 2-1

An atom has a center region with a positive charge.

The Parts of an Atom (cont.)

Lesson 2-1

? The nucleus is the region at the center of an atom that contains most of the mass of the atom.

? Two kinds of particles make up the nucleus-- protons and neutrons.

? A proton is a positively charged particle in the nucleus of an atom.

? A neutron is an uncharged particle in the nucleus of an atom.

The Parts of an Atom (cont.)

Lesson 2-1

An electron is a negatively charged particle that

occupies the space in an atom outside the nucleus.

The Parts of an Atom (cont.)

Lesson 2-1

? An electron cloud is the region surrounding an atom's nucleus where one or more electrons are most likely to be found.

? Electrons occupy certain areas around the nucleus according to their energy.

The Parts of an Atom (cont.)

Lesson 2-1

? Electrons close to the nucleus are strongly attracted to it and have less energy.

? Electrons farther from the nucleus are less attracted to it and have more energy.

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