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Atomic Structure

A reminder for entrance procedure in an Atomic Structure class, including activities, objectives, vocabulary, and guided practices. Learn about atomic mass, subatomic particles, electron cloud, nucleus, and atomic mass unit.

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Atomic Structure

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  1. Atomic Structure Ms. Millimet August 19, 2014

  2. Entrance Procedure – Reminder! • Walk in classroom silently • Pick up papers that you need from side table then walk to your seat (Keep walking forward, do not turn around) • Check board and Sit down at your desk. • Write down homework in your planner. • Take out have-outs: Science Stud Buddy (Binder), papers for class, pen/pencil • Put homework in the top of the table from last night • Start DO First • 5 minutes to work on do first, silently and independently • On top of your guided notes!

  3. Objectives • SWBAT explain the location, masses and charges of protons, electrons, and neutrons. • SWBAT compare and contrast the nucleus with the electron cloud. • WHY? • Atomic structure explains all of the materials and substances we have in the universe • Atomic structure is basis of chemistry and the rest of our unit! • Earn commended on STAAR and reach our growth goal on Cas!

  4. Atomic Structure - Nonfiction Reading • Read through the passage in pairs. • Fill in the table below (use pencil in case you want to change answers!) • Note: Wait on Mass – Will learn as a class 

  5. AMU = atomic mass unit = 1 proton or 1 neutron

  6. Atomic Mass (an atom’s mass) is calculated by… • Protons + Neutrons

  7. So, how would we draw an atom? • Nucleus is in the center. Nucleus is very tiny and very dense. • Electrons orbit in the electron cloud. They are at different energy levels. Electron cloud is mostly empty space and is very large.

  8. Check Yourself! • Which statement is NOT true? • A proton is positively charged and located in the nucleus • A electron is negatively charged and located in the electron cloud • A neutron is negatively charged and located in the nucleus? • Which statement(s) correctly compares the mass of 2 subatomic particles? • A proton has less mass than a neutron • A proton has less mass than an electron • A proton has more mass than a neutron • A proton has more mass than an electron • A proton has the same mass a neutron • A proton has the same mass as an electron

  9. Guided Practice: Answer the questions on guided notes with your table group. Table Managers: Read question out loud, ask peers for ideas/answers/evidence! Stop when you get to “Try On Your Own.” Vocabulary Box: • Proton: Positively charged subatomic particle located in nucleus with a mass of 1 AMU • Neutron: Neutral subatomic particle located in nucleus. Has no charge and a mass of 1 AMU (Neural/ no charge, nucleus,) • Electron: Negatively charged subatomic particle located in the electron cloud with no mass. • Nucleus: Center of the atom. Contains nearly all the mass of atom. Very dense and contains protons and neutrons. • Atomic Mass: total mass of atom = # of protons plus # of neutrons • Atomic Mass Unit: same as one proton or one neutron

  10. Guided Practice Answers: • 1. What is an atom? A tiny particle that makes up all matter • 2. What are the two main regions of an atom? The nucleus (center) and the electron cloud • 3. Which subatomic particles are found in the nucleus? Protons and Neutrons • 4. Which subatomic particles fly around in clouds? Electrons • 5. Which subatomic particle has no electrical charge? Neutrons • 6. Which subatomic particle has a positive charge? Protons • 7. Which subatomic particle has a negative charge? Electrons • 8. Which part of the atom has the most mass: the nucleus or the cloud? Nucleus • 9. Which is the only particle not found in the nucleus? Electrons • 10. Which has more mass: 2 electrons, 1 electron and 1 proton, or 2 protons? 2 protons has the most mass (2 AMU). Note: 2 electrons = 0 AMU and 1 proton and 1 electron has mass of 1 AMU

  11. Guided Practice Answers: • 1. Which part of diagram represents the entire nucleus of the atom? A. B. C. D. E. • 2. Which part of the diagram represents the neutrons in an atom? A. B. C. D. E. • 3. Which part of the diagram represents the particle with the least mass? A. B. C. D. E. • 4. Which part of the diagram represents the protons? A. B. C. D. E. • 5. Which part of the diagram represents a negatively charged particle? E. • Note: D. is labeling 2 different energy levels or layers where electrons can be found.

  12. Independent Practice • Complete the Try it On Your Own Questions on your guided notes • Work on Study Tool to help you memorize vocabulary and subatomic particles in atoms. • HOMEWORK: Complete the Study Tool and the Homework you picked up on your way into class • Exit Ticket with 8 minutes left • Take out red pen when you are done • Put notes and Study Tool in Science Study Buddy Binder

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