1. Beanium Isotopes Lab

2. Common core connection
Objectives
Today I will be able to:
Identify the parts of the atom and their isotopes
Calculate atomic masses of isotopes given a set of data
Calculate isotopes of beanium by collecting data and completing a lab.
Informal Assessment – monitoring student interactions and questions as they complete the practice and lab
Formal assessment – analyzing student responses to the exit ticket, lab and practice problems
Common core connection
Make sense of problems and persevere in solving them
Reason abstractly and quantitatively.

3. Lesson Sequence Evaluate: Warm –Up
Explain: Modern Atomic Theory/Isotope Notes
Elaborate: Isotope Practice
Explore/ Elaborate: Beanium Isotopes Lab
Evaluate: Exit Ticket

4. Warm - Up Compare a proton to an electron.
How many protons does Ca have? F? How do you know?
Define ion.
Distinguish between anions and cations.
Define isotope.

5. Warm-Up
Complete the half sheet!

6. Objective Today I will be able to:
Identify the parts of the atom and their isotopes
Calculate atomic masses of isotopes given a set of data
Calculate isotopes of beanium by collecting data and completing a lab.

7. Homework
Finish Lab

8. Agenda Warm –Up Homework Questions? Modern Atomic Theory/Isotope Notes
Isotope Practice
Beanium Isotopes Lab
Exit Ticket

9. Modern Atomic Theory/Isotope Notes

10. Modern Atomic Theory
Atom – smallest part of matter that represents a particular element
Composed of electrons, protons, and neutrons
Protons and neutrons (nucleons) form the nucleus of an atom
Mostly empty space

11. Subatomic Particles Name Symbol Charge Proton p+ +1 Neutron n Electron
Electron e- -1

12. 9.109 x 10-28 (considered to be zero)
Subatomic Particles
Name
Mass (g)
Mass (amu)
Location
Proton
1.673 x 10-24 1
Nucleus
Neutron
Electron
9.109 x (considered to be zero)
.0005
Outside Nucleus

13. Do particles smaller than protons and neutrons exist?
Quarks – subunits of protons and neutrons
Never observed directly or found in isolation
6 “flavors” or different types
Most common are:
“Up” quark = +2/3
“Down” quark = -1/3
“Up” and “down” quarks are the most stable
“Up” and “down” quarks have the smallest mass are the lowest energy

14. Quarks Protons are made of two “up” quarks and one “down” quark
Neutrons are made of one “up” quark and two “down” quarks
Quarks are held together by “gluons”

15. How do electrons form? Mesons – particles made of quarks
Short-lived particle - produced by high energy interactions of matter
Mesons decay to form electrons

16. If each proton and neutron has a mass of one amu, then why aren’t the atomic masses on the periodic table whole numbers?
Isotopes of elements
atoms with the same number of protons but different numbers of neutrons

18. Isotopes Some isotopes are found more common than others
We can determine which isotope is more common by looking at the atomic mass
Atomic Mass is calculated weighted averages

20. How do we calculate a weighted average?
Category
Score
Exams (50%)
80%
Labs (25 %)
75%
Classwork (15 %)
95%
STEM fair (10 %)
87%
(.50 x 80) + (.25 x 75) + (.15 x 95) + (.10 x 87) =
81. 7 % = 82 %

21. Atomic Mass is calculated using the same method of weighted averages
Carbon Isotope
C – 14 1%
C - 12
99%
(.01 x 14) + (.99 x 12) =
12.02 amu

22. Isotope Practice

23. Beanium Isotopes Lab

24. Exit Ticket
Which isotope of carbon is more common C-12 or C- 14? Explain your answer