Objective: SWBAT define atoms and describe their properties

Sept 8st: Subatomic Particles

Do Now: 1. What is the definition of the word

“atoms”?

2. What things are made from atoms?

3. How big are atoms?

Daily Forecast

Do Now (5 min)Powers of 10 Video (10 min)Sorting Activity (15 min)Discussion/ Notes (15 min)Exit Ticket (5 min)

SUB-ATOMIC PARTICLES

Structure of atoms

I. What is an atom?

Atoms are the basic unit of matter All matter is made up of tiny atoms

Review: What are the 3 forms of matter?Solid, Liquid, and Gas

Atom

Atoms are the building blocks of all matter

water

Molecule

Atom

O

H H

Subatomic

Subatomic ParticlesProton Neutron Electron

Location in the Atom

Mass

Charge

II. Structure of an atom

There are 3 subatomic particles in an atomProtonNeutronElectron

III. Atomic Nucleus

The nucleus is a dense area at the center of the atomProtons and neutrons are found in the

atomic nucleus

THE PROTON

p+ •Found in the nucleus •Heavy: 1 amu• Positive: +1

THE NEUTRON

N°

• Located in the nucleus.•Heavy: 1 amu• Neutral: 0 charge

Nucleus is held together with

nuclear energy

Electron cloud is full of zipping electrons

Nucleus: heavy but tiny part of atom.Found in center of an atom and holds 2 important subatomic parts.

½ Football FieldOuter Edge

of Atom

Nucleus

50 End

Zo

ne

THE ELECTRON

• Found in the electron cloud•Very light: 0 amu

• Negative: -1

e-

V. How small is an atom?

Atoms are TINY!20 million hydrogen atoms would fit inside the period at the end of this sentence.

You are made of billions and billions of atoms

Protons

e-p+ N°

NeutronsElectrons

Positive+1

Neutral0

Negative-1

N0P+e-

e-

e-

P+P+

Please complete the following table

Proton Neutron Electron

Location in the Atom

Mass

Charge

Nucleus Nucleus Electron Cloud

Heavy Heavy Very Light

Positive +1

Neutral 0

Negative -1

VII. Review of Atomic Structure

What is the basic unit of matter? Atom

What are the 3 subatomic particles? Proton, Neutron, Electron

What’s the electrical charge of a proton? Positive (+)

What’s the electrical charge of a neutron? Neutral

What’s the electrical charge of an electron? Negative (-)

0

+++

- -

-

Name 3 things that are wrong with this atom

0

+ +

-

+

--

0

Name 3 things that are wrong with this atom

00

0 0

+

+

-

-+

0

0

What is wrong with this Atom?

Draw an atom CORRECTLY

2 protons, 1 neutron, 2 electrons

Homework

Read the “Atoms” textComplete the attached homework questions

Exit Ticket

1. What makes up the nucleus of an atom? List the particles and their charges.

2. Draw an atom that has 3 protons, 2 neutrons, and 3 electrons.

3. Describe the difference in size between protons and electrons.