Atom Rules Determination Activity Press your “End” button at any time to go to the HYPERINDEX™. Atom Rules Determination Activity An Exercise in Pattern Recognition Init 8/22/2014 by Daniel R. Barnes WARNING: This presentation may contain images and other intellectual content stolen brazenly from the internet without the permission of the owners. It is meant for non-profit use by Mr. Barnes’ current chemistry students only. Do not copy or distribute this file. Its very existence may be illegal. WARNING: Pedagogically, this lesson takes an awful lot of chances. It might have to be scuttled for all but gifted classes . . . But then, again . . . Hmmm . . . .

SWBAT . . . . . . induce mathematical definitions of atomic number, mass number, and electric charge. “SWBAT = “Students will be able to”

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PRETTY PLEASE! If you already know the rules for atoms about protons, neutrons, electrons, atomic number, mass number, and electric charge, please don’t tell other people in your group what they are. It will kill the learning experience for them. They need to exercise their thinking muscles. shhhhhh!

DIRECTIONS Look at your first atom and copy down its information in a neat, tabular format. (Rows & columns – make a data table.) Look at your Atom Rules Determination Activity worksheet and see if you think you can make any educated guesses about what goes in the boxes. (In other words, hypothesize.) Pick another atom, copy down its stats, and decide whether or not your guesses about what goes in the boxes are correct. Repeat this cycle until you’ve seen so many atoms that you feel very confident that you know what the rules about atoms are. At some point during the period, your instructor will start asking the audience what they think the rules are for atoms. Students will be asked to explain why they believe what they believe, based on the example atoms provided. If the instructor says an answer is right, correct your worksheet answers if necessary.

Determination Activity Daniel R. Barnes Init 8/22/2014 Last update = 4/6/2019 2:10 PM Atom Rules Determination Activity Name: Per: Date: 1st shell can hold 2 e-, 2nd shell can hold 8 e- Protons have a +1 electric charge. In an atom’s symbol, mass number is a left-hand superscript. Neutrons have no electric charge. (They’re neutral.) In an atom’s symbol, electric charge is a right-hand superscript. Electrons have a -1 electric charge. In an atom’s symbol, electric charge is written # first, then sign (idk why!) Protons and neutrons have roughly equal mass, but that of the neutron is slightly larger. Atomic number = number of protons. Atomic number determines element. Electrons have very little mass compared to protons and neutrons. Mass number = protons + neutrons Electric charge = protons - electrons

Ne + 10 Atom #1) Protons = 10 Neutrons = 0 Symbol = Electrons = 9 Element = neon Atomic number = 10 Mass number = 10 Electric charge = +1

Ne 10+ 12 Atom #2) Protons = 10 Symbol = Neutrons = 2 Electrons = 0 Element = neon Atomic number = 10 Mass number = 12 Electric charge = +10

Li 7- 3 Atom #3) Protons = 3 Neutrons = 0 Symbol = Electrons = 10 Element = lithium Atomic number = 3 Mass number = 3 Electric charge = -7

Be 2- 7 Atom #4) Protons = 4 Symbol = Neutrons = 3 Electrons = 6 Element = beryllium Atomic number = 4 Mass number = 7 Electric charge = -2

Li 2- 9 Atom #5) Protons = 3 Symbol = Neutrons = 6 Electrons = 5 Element = lithium Atomic number = 3 Mass number = 9 Electric charge = -2

C 6+ 14 Atom #6) Protons = 6 Symbol = Neutrons = 8 Electrons = 0 Element = carbon Atomic number = 6 Mass number = 14 Electric charge = +6

C 2+ 7 Atom #7) Protons = 6 Symbol = Neutrons = 1 Electrons = 4 Element = carbon Atomic number = 6 Mass number = 7 Electric charge = +2

Ne 9+ 20 Atom #8) Protons = 10 Symbol = Neutrons = 10 Electrons = 1 Element = neon Atomic number = 10 Mass number = 20 Electric charge = +9

Ne + 17 Atom #9) Protons = 10 Symbol = Neutrons = 7 Electrons = 9 Element = neon Atomic number = 10 Mass number = 17 Electric charge = +1

C 16 Atom #10) Protons = 6 Symbol = Neutrons = 10 Electrons = 6 Element = carbon Atomic number = 6 Mass number = 16 Electric charge = 0

H 2- 6 Atom #11) Protons = 1 Symbol = Neutrons = 5 Electrons = 3 Element = hydrogen Atomic number = 1 Mass number = 6 Electric charge = -2

F 5+ 15 Atom #12) Protons = 9 Symbol = Neutrons = 6 Electrons = 4 Element = fluorine Atomic number = 9 Mass number = 15 Electric charge = +5

Li + 5 Atom #13) Protons = 3 Symbol = Neutrons = 2 Electrons = 2 Element = lithium Atomic number = 3 Mass number = 5 Electric charge = +1

He 3- 7 Atom #14) Protons = 2 Symbol = Neutrons = 5 Electrons = 5 Element = helium Atomic number = 2 Mass number = 7 Electric charge = -3

O 5+ 12 Atom #15) Protons = 8 Symbol = Neutrons = 4 Electrons = 3 Element = oxygen Atomic number = 8 Mass number = 12 Electric charge = +5

He 4- 8 Atom #16) Protons = 2 Symbol = Neutrons = 6 Electrons = 6 Element = helium Atomic number = 2 Mass number = 8 Electric charge = -4

Be 4- 8 Atom #17) Protons = 4 Symbol = Neutrons = 4 Electrons = 8 Element = beryllium Atomic number = 4 Mass number = 8 Electric charge = -4

B 2- 13 Atom #18) Protons = 5 Symbol = Neutrons = 8 Electrons = 7 Element = boron Atomic number = 5 Mass number = 13 Electric charge = -2

Determination Activity Daniel R. Barnes Init 8/22/2014 Last update = 4/6/2019 2:10 PM Atom Rules Determination Activity Name: Per: Date: 1st shell can hold 2 e-, 2nd shell can hold 8 e- Protons have a +1 electric charge. In an atom’s symbol, mass number is a left-hand superscript. Neutrons have no electric charge. (They’re neutral.) In an atom’s symbol, electric charge is a right-hand superscript. Electrons have a -1 electric charge. In an atom’s symbol, electric charge is written # first, then sign (idk why!) Protons and neutrons have roughly equal mass, but that of the neutron is slightly larger. Atomic number = number of protons. Atomic number determines element. Electrons have very little mass compared to protons and neutrons. Mass number = protons + neutrons Electric charge = protons - electrons

MORE QUESTIONS: 1. Why should I believe your mathematical definition of atomic number? 2. Why should I believe your mathematical definition of mass number? 3. Why should I believe your mathematical definition of electric charge?

HYPERINDEX Atom #1 Atom #10 Push a button. Go to a place™. Atom #2 Title Page Atom #12 Atom #4 Directions Atom #13 Atom #5 Worksheet – no reveal Atom #14 Atom #6 Worksheet – click to reveal Atom #15 Atom #7 Atom #16 Atom #8 Atom #17 Atom #9 Atom #18