Beanium Isotopes Lab

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.

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

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.

Warm-Up Complete the half sheet!

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.

Homework Finish Lab

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

Modern Atomic Theory/Isotope Notes

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

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

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 10-28 (considered to be zero) .0005 Outside Nucleus

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

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”

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

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

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

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 %

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

Isotope Practice

Beanium Isotopes Lab

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