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Chemistry Pre-quiz

Chemistry Pre-quiz. Pick an element (#1 - #20). State name. Give chemical symbol Identify number of subatomic particles Identify atomic number, mass number Identify # of valence e - How might element react when bumps into another element?.

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Chemistry Pre-quiz

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  1. Chemistry Pre-quiz • Pick an element (#1 - #20). State name. • Give chemical symbol • Identify number of subatomic particles • Identify atomic number, mass number • Identify # of valence e- • How might element react when bumps into another element?

  2. Atomic Theory & Periodic Table of Elements Properties • You have 5 – 10 minutes to color YOUR Periodic Table of Elements (PTof E) as follows • Pick 4 different colors (can swap with neighbor) • Use one color to color in each of the following GROUPS • 1A & 2A • 3A, 4A, 5A, 6A • 7A • 8A

  3. Today’s objectives • Understand how to use the Periodic Table of elements in determining # of subatomic particles, including protons, neutrons, and electrons • Understand how to create one type of atomic model • Understand how to use periodic table to determine # of valence electrons, and therefore predict reactivity

  4. Today’s vocabulary words • FCAT elementary: Element, matter • FCAT middle: Electron, neutral, neutron, nucleus, proton • FCAT high: atomic #, mass # • Textbook / general knowledge: property, valence, group, period, subatomic particle

  5. Draw the following atomic model on your PTof E, near the key Valence electron(s) 14 Si Silicon 28.066 Atomic number Symbol Element name atomic mass (mass number) p+ n0 e- At the end of this lecture, I should be able to calculate number of protons, neutrons, electrons; know what the symbols for protons, neutrons, and electrons are; and describe the atomic location of each particle

  6. Atomic Theory “rules” • Atomic # = # protons • In a neutral atom, # electrons = # protons • Content check: how do you know the number of protons? • The atomic number • To calculate # neutrons in an ATOM, mass # - atomic # = # of neutrons. • Element’s basic unit is an atom • One re: PT of E coming in next slide.

  7. PT of E property: Valence electrons are coded information – the group number 1A – 8A tells you all you need to know. And now you know how to predict reactivity • 1ST Situation • 2ND Situation • 3RD Situation • 4TH Situation CAFETERIA STORY

  8. Other Types of Atoms • Objectives: know the difference between an atom, ion, and isotope; know how to calculate the charge of an ion; know how to paraphrase the textbook • Vocabulary: FCAT Middle – Neutral; FCAT High – Atomic number, Mass number, Isotope; Textbook / general knowledge: Ion

  9. RAP Strategy (Paraphrasing Routine) • Read the selection • Ask myself what’s the Main Idea? • Put it into my own words • Finding main idea • 1st, 2nd, or last sentence in a paragraph • Asking who, what, where, when, why and how?

  10. Isotope Who? What? Where? When? Why? How? Main idea of sentence? Ion Who? What? Where? When? Why? How? Main idea of sentence? RAPping Ion & Isotope

  11. Framing Routine • Frame 3

  12. Bonding • Objectives: understand the reason that atoms bond to form molecules; how to draw another atomic model; difference between an ionic and covalent bonds; • Vocabulary: FCAT Elementary - compound; FCAT High – compound, covalent bond, molecule; Textbook / general knowledge: Ionic bond

  13. Bonding – an electron’s point of view • Electron location is ___ • Called energy _____ • Energy levels have sublevels called _____ • Energy levels have a maximum # e-: 2n2 • _______ are located in highest occupied energy level • PT of E Family’s property & energy levels 14 Si 28

  14. Bonding • Why Bond? To become more stable. • Types of bonds we’ll discuss? Ionic, Covalent, Hydrogen, • 8 is the magic number (________ ______) • Group 8 (Loners) Don’t Bond • Group 3 – 6 (Friends) Share electrons • Groups 1-2 (Victims) Lose electrons • Group 7 (Bullies) Take electrons

  15. Draw atoms to ions to ionic bond

  16. Draw covalent bonded atoms

  17. Your turn • Read pages 33 & 34 to fill in a FRAME regarding covalent & ionic bonds • Think about how and why the bonds form, the strength of the bond, the PT of E groups involved, and the orbital positions on the atoms involved • Frame 3

  18. MgO SO3 CuO Cu2O Ag2CO3 Fe2S3 Zn(NO3)2 H2SO4 Al(OH)3 H3PO4 Counting Atoms in a molecule

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