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Science Starter 1. What information can you gain about Gold (Au) just from looking at the PToE? 2. Fill in the following information: Element: Zinc Atomic Number: Mass Number: Number of Protons: Number of Neutrons: Number of Electrons: 3. What’s one thing you understood, one thing you didn’t understand yesterday? Objective •SWBAT identify the differences between neutral atoms, ions, and isotopes. •SWBAT provide number of protons, neutrons, and electrons for neutral atoms, isotopes, and ions. Agenda • Science Starter • Announcements • Atomic Structure Review • Isotopes & Ions • Exit Ticket Announcements • Today: Isotopes and Ions • Thursday: Review • Friday: Unit 1 Test • Monday: Unit 2: Intro to the Periodic Table ▫ This includes videos, coloring, etc. Element lithium Carbon Chlorine Silver Number of Protons Number of Neutrons 3 4 6 17 47 Number of Electrons Mass Number Nuclear Notation 3 7 6 6 12 18 17 35 7 3 Li 12 6 C 35 Cl 17 60 47 107 107 47 Ag Unit 1: Chemistry Matters Isotopes and Ions February 3, 2016 • Isotopes: atoms that have the same number of protons but different number of neutrons. ▫ Ex: carbon-12 and carbon-14 • The number next to the element represents the mass number. Carbon - 14 Element Name Mass Number **** Notice that this is a new notation!**** STOP AND THINK What are the three types of notations that we have talked about so far? How do they differ? Element Chemical Symbol # protons # # neutrons electrons Aluminum-27 Al-27 13 14 13 Aluminum-28 Al-28 13 15 13 Copper- 64 Copper-60 What is different about isotopes of the same element? 1. ______________ 2. ______________ What is the same about isotopes of the same element? 1. ______________ 2. ______________ •We know… ▫ Protons and neutrons are in the _________ ? ▫ Electrons are located __________ ? • Electrons ▫ Where to they exist? ▫ What charge do they have? • What is true about protons and electrons in a NEUTRAL (regular) atom? Ions • ION = an atom with a positive or negative charge; atom with extra or fewer electrons Think about what charge electrons have. • Anion: a negative ion Does this have MORE or LESS electrons??? • Cation: a positive ion Does this have MORE or LESS electrons??? • Let’s draw this so we can see… Picture of Fl(pluses and minuses) Picture of Fl(pluses and minuses) THINK: Can we add or subtract protons to affect charge? Substance: Chloride Symbol: Cl-1 Atomic Number: Mass Number: 35 Number of Protons: Number of Neutrons: 18 Number of Electrons: Substance: Oxide ion Symbol: O2Atomic Number: 8 Mass Number: 16 Number of Protons: Number of Neutrons: Number of Electrons: Substance: Strontium ion Symbol: Sr 2+ Atomic Number: Mass Number: 76 Number of Protons: 38 Number of Neutrons: Number of Electrons: What is different about ions of the same element? 1. ______________ 2. ______________ What is the same about ions of the same element? 1. ______________ 2. ______________ • With a partner at your table, complete the ion worksheet. You will have approximately 10 minutes. • Only talk about the task at hand. I will take points off your grade if you are not! ▫ Once you have decided on an area to work, you may not get out of your seat unless you ask. • When you finish, raise your hand, and I will send you to the solution station to check your answers! Exit Ticket Exit Ticket 1. What charge does a cation have? 2. How many electrons does Cl- have? 3. How many protons, neutrons, and electrons in C-14? 4. Write the nuclear notation for the following element. P=7 N=8 E = 10