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.

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Presentation transcript:

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 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 atom Small, dense (packed tightly) Contains protons and neutrons: most of the atom’s mass So 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 zero Number of electrons equals the numbers of protons to cancel out the charges – (think of -1+1=0) electrons = negative

Review: Parts of an Atom PartsChargeLocationMass Proton Positive (+)Nucleus1 amu Neutron No chargeNucleus1 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 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