October 4, 2107 Complete Half-Life Worksheet If you finish worksheet before time is up, work on GIZMO, Socrative, or USA Test Prep until we go over the sheet HOMEWORK: Finish classwork. Read chapter 16, section 2. USA Test Prep Radioactivity due 10/13. Last two USA Test Preps will remain open until 10/6. USA Test Prep Credit Recovery info is on the blog.

Catch-Up Day Finish Nuclear Decay & Half-Life GIZMO (www.explorelearning.com, log in should be your lunch #@ecms & your lunch number Complete Socrative assessment (www.socrative.com, room 259085, last name, first name) with an 80% or better Complete old USA Test Prep – LAST CHANCE – locked @4:30 on 10/6 Work on current USA Test Prep – due 10/13 Review for Friday’s quiz

Homeroom - Conferences Return the white scheduling paper if you haven’t yet and your parents either DON’T want a conference or DIDN’T get my email yesterday Parents who DO want a conference can sign up on the Sign-Up Genius link I sent out yesterday (I will put the link on the blog, too) Conferences are 20 minutes long and are scheduled from 1:30 – 4:10 Phone conferences are an option I need to hear from EVERY parent! I will send out final conference forms next week after 1st quarter grades are done (parents can check the Sign-Up Genius, too)

Radioactivity Basics Types of decay: alpha, beta, gamma Alpha: 2 protons & 2 neutrons (He nucleus), least dangerous, can be stopped by a piece of paper, changes element’s atomic number by -2 & mass -4 Beta: electron, neutron turns into a proton & electron, mid-danger, can be stopped by aluminum foil, changes atomic number +1, doesn’t change mass Gamma: a wave, most dangerous, requires 3 feet of concrete or 6 inches of lead to block

Radioactivity Basics Fission: 2 atoms are split by a neutron, energy can be created by a chain reaction, used in nuclear bombs & power plants Fusion: 2 atoms are fused together to create a bigger atom; energy is released in the process, found in stars Half-life: the amount of time it takes for half the mass of radioactive particles to decay into stable material, follows a predictable pattern, used for dating materials Pros: can produce clean energy, used in science & medicine Cons: used in weapons, can cause illness/death, waste is hard to remove, accidents are very problematic

Today Go to www.explorelearning.com (log-in w/lunch#@ecms & lunch number) There are TWO GIZMOS to complete, Nuclear Decay and Half-Life After completing the virtual labs, go to Socrative Room 259085 Last name, first name Complete with an 80% or better Write your score on the paper before turning in Finish for homework if not complete in class

October 3, 2107 Go to Socrative Enter Room 259085 Put last name, first name Answer the questions as best you can without notes – this is RETRIEVAL practice HOMEWORK: Finish classwork. Read chapter 14, section 1. USA Test Prep Law of Conservations of Mass/Matter due 10/13. Last two USA Test Preps will remain open until 10/6. USA Test Prep Credit Recovery info is on the blog.

Performance Assessment Tomorrow You may use your notes on the periodic table You should know how elements change across a row and down a column You should know where the metals, metalloids, non-metals, and noble gases are You should know how to use the atomic number and atomic mass to determine the number of protons, neutrons, and electrons You should know how to use the Family (Group) number to determine the ionic charge

Law of Conservation of Mass (Matter) Basics The mass of the reactants equals the mass of the products in a chemical reaction ~ OR ~ Matter is neither created nor destroyed, but it can be changed from one form to another The numbers and kinds of atoms don’t change; all they do is rearrange

LOCOMM Basics The chemicals being mixed are the REACTANTS They are written on the left side of the arrow The chemicals being created are the PRODUCTS (think different matter, not new) They are written on the right side of the arrow The arrow means YIELDS (not equals) – thinks “makes” The coefficient is in front of the atom or molecule – it CAN be changed The subscript is part of the molecular formula – it CAN’T be changed