Atomic Number, Isotopes, and Review

February 19th, 2013

   

Agenda

1) Warm-up and C-note set-up2) Activity and Notes3) Concept Map4) Review Time5) Jeopardy

No homework today. Study for your test on Friday

   

Set up C-Notes

Please set up your C-Notes for today.

Topic: Atomic Number and IsotopesFocus Question: What determines which element an atom will be?

Then answer this warm-up questionWrite one thing that you learned in this unit, and one thing you have a question about.

Mr. Lee will choose 3 students to share.

   

Team Building ActivityLine up by oldest to youngest in the class. For example, if your birthday is 12/25/1999, you would stand in front of your friend whose birthday is 1/24/2000.

Rule: Again, complete this activity with no talking. Use non-verbal communication skills. See how quickly you can form this line.

   

Atomic Number

Please copy all notes in green

Much like you all did with your birthday, the periodic table is ordered from beginning to end by a special number. The periodic table is ordered from lowest atomic number (1) to highest atomic number.

What is the atomic number?

   

Atomic number is the number of protons in an atom. Every element has a different number of protons.

The atomic number is written at the top of every element in the periodic table.

   

   

Changing the number of electrons or neutrons in an atom will not change the element.

Ex: Na (Sodium) naturally has 11 protons, 11 neutrons, and 11 electrons. - If you change the number of electrons to 12, or neutrons to 12, it will still be sodium - If you change the number of protons to 12, it will become magnesium

   

Why? Because the number of protons determines what element an atom will be.

   

Quick Notes on Isotopes

Isotopes are atoms that have a different number of neutrons. Mass number is the sum of protons +

neutrons in an atom.For example: Carbon naturally has 6 protons, 6

electrons, and 6 neutrons.The isotope Carbon-13 has 6 protons, 6 electrons, and 7 neutrons. Mass # = ?

The isotope Carbon-14 has 6 protons, 6 electrons, and 8 neutrons. Mass # = ?

   

Review questions

Answer these questions in the “Summary” section of your Cornell Notes

1) What # determines how elements are ordered on the periodic table?

2) What is the atomic #?3) What is mass #?

4) What are isotopes?5) What sub-particle determines what element an

atom will be?

   

Jeopardy

Rules: Mr. Lee will select a student with his popsicle sticks. That student has three seconds to decide to answer or pass.

If the student chooses pass, Mr. Lee will select another popsicle stick. If the student chooses to answer, he/she will have 10 seconds to discuss with their group and then give the answer.

If that student is correct, they will earn the amount of points for that question. If they are wrong, they will lose that amount.

   

The winning team will earn 5 points extra credit on their test on Friday. Mr. Lee will choose a scorekeeper who will earn 2.5 points but will not play in the game.

Since this is Jeopardy, you MUST answer in the form of a question. Let's demonstrate.

   

This famous basketball player had many nicknames, one of them being “His Airness”

(To get this right, you must respond in the form of a question)

   

Who is Michael Jordan?

   

There is a Bonus Question, a Double Jeopardy, where you can wager any amount of $ before answering the question, and a final Jeopardy

where instructions will be given.

Let's demonstrate double jeopardy

   

Double Jeopardy! How much will you wager? Give a $ amount. You will win this much if correct

and lose this much if incorrect.

   

This famous 2-time finals MVP was named after a delicious steak his father ate in Japan.

   

Who is Kobe Bryant?