History of the Atom

Opener

Copy question and answers

What are the building blocks of all matter A. Mass B. Molecules C. Atoms D. Pure Substances

Review

Test

Binder Check

Turned in Openers

Test

Take a look

Make sure that I graded it correctly I think there may have been a mistake or two on the key

15 minutes to correct problems

Standards List

New Standards List

New Unit Two weeks Broken up with Fall Break It will be important for you to study Last unit of the term

Pre-Test

25 minutes

Answer all questions

Do your best

Opener

Copy question and answers

What subatomic particles have the same mass? A. Proton and electron B. Proton and neutron C. Electron and neutron D. All three have the same mass but different charge

Review

Test corrections

Pre-Test

Looking forward… ACT practice test tomorrow Baseline data for student growth

Notes

Notes on the Atom

You may know most, if not, all of this stuff

First off, what is an atom?

Atoms are the smallest parts to which an element can be divided yet still be that element.

Atoms are the building blocks of all matter.

How small is an atom?

An atom is so small that a penny contains about 2 x 1022 or 20,000,000,000,000,000,000,000 atoms!!!

But there’s more…

Atoms consist of even smaller particles. These include:– Protons– Neutrons– Electrons

Parts of an Atom

The protons and neutrons make up the center or nucleus.

The Nucleus

The center of an atomSmall, dense (packed tightly)Contains protons and neutrons:

most of the atom’s massSo dense, if it were the size of a

grape, it would weigh over 9 million tons!

Protons

Located in the nucleus

Positive charge (+)Mass of 1 atomic

mass unit (amu)

protons = positive

Neutrons

Located in the nucleus

Have no charge - neutral

Mass of 1 amu

neutrons = neutral

Electrons

Found outside of the nucleus in electron clouds – (think of rings around a target)

Negatively charged (-)Mass of almost zeroNumber of electrons equals the numbers

of protons to cancel out the charges – (think of -1+1=0) electrons = negative

Review: Parts of an Atom

Parts Charge Location Mass

Proton Positive (+) Nucleus 1 amu

Neutron No charge Nucleus 1 amu

Electron Negative (-) Electron Clouds

Almost zero

Practice Problems

Protons = Electrons

Protons + Neutrons = Mass number– Mass number – Protons = Neutrons– Mass number – Neutrons = Protons

Your turn

Work on this now

What you don’t finish will be homework

Opener

Copy question and answers

What is the charge on the nucleus of the atom?– A. Positive– B. Negative– C. Neutral– D. It depends on the type of atom

Review

Notes on the Atom– Parts?– Charges?

Worksheet– Any questions?– Turn in

Practice ACT

Do your best– Benchmark is 23

35 minutes– Don’t begin until I tell you

This is for baseline data but I am giving you an effort grade today

Opener

Copy question and answers

How many protons, neutrons and electrons are in Calcium-40?– A. 20, 21, 20– B. 20, 19, 20– C. 40, 40, 40– D. 20, 20, 20

Review

Practice ACT– We still need to score – Goal Setting Sheet

Results

Let’s grade them– Need to get your score– Answer questions on Goal Setting Sheet

Make sure to graph your results

I will assign you a number code that will represent you

Scores will be placed on a data wall

Timeline Project

Research scientists that contributed to the atom

Today is the only day we have laptops

We will take time in class today and tomorrow to make the timeline

Opener

Copy question and answer– This one isn’t multiple choice

Which element has 12 protons, 12 electrons and 13 neutrons? (Give symbol, name and mass number)

Review

Timeline project– Any questions?– Any issues?

Make sure you have a happy and safe break

Timeline Project

Turn in before you leave– If not, it will be a zero

Computers are available– I have paper, colored pencils, markers, crayons

If you have questions, let me know

Surprise!!! Don’t Tell Anyone!!

Happy Fall Break

Finish your timeline over break– Don’t forget– 100 points on Monday

Not “Can I finish on Monday” It has to be done when you walk in

Opener

Copy the question and answers

Which scientist is known as the Father of the Atom?– A. Democritus– B. John Dalton– C. J.J. Thomson– D. Ernest Rutherford

Review

Hope you had a wonderful break

Turn in your timelines

Notes

I am going to quickly go over these

Take notes on what you want/need

Opener

Copy the question and answers

Review

Notes on Atomic Theory– I hope you paid attention

Worksheet

12 minutes to complete– You may work together– All stuff I covered yesterday

Missing Pieces

Did not talk about Bohr

Need to finish those notes

Bohr Models

Guided Practice

Answers to Guided Practice PowerPoint need to go in your notebook

Assignment

Choose 20 atoms and draw the Bohr Models– DO NOT use ones we have already drawn in

class

Due tomorrow