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SPI 0807.9.9 Periodic Table. Notes. Date. Tennessee SPI Objective: Use the periodic table to determine the properties of an element. Essential Question(s) How do I use the periodic table to… a) …determine the atomic number? b) …determine the atomic mass?

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  1. SPI 0807.9.9 Periodic Table Notes Date Tennessee SPI Objective: Use the periodic table to determine the properties of an element. Essential Question(s) How do I use the periodic table to… a) …determine the atomic number? b) …determine the atomic mass? c) …determine the number of sub-atomic particles? d) …determine other properties in an atom? Success Criteria I can use the periodic table to determine the properties of an element.

  2. We use a chart to organize elements called… The Periodic Table • F.Y.I We have discovered 98 naturally occurring elements • F.Y.I. We have also formed 20 man-made elements 98 + 20 = 118 total

  3. SPI 0807.9.9 Periodic Table Notes Science . • Most common element in the universe is hydrogen (About 73% of all matter is hydrogen) • 2nd most common element in the universe is helium 1 2 (About 25% of all matter is helium) Stars mainly consist of these two elements! H He Helium Hydrogen 1.0 4.0 73% of all matter 25% of all matter

  4. SPI 0807.9.9 Periodic Table Science Notes Periodic table • Is a chart of all known chemical elements • Displays the different types of atoms (called elements) Purpose • Is a tool used to reference information about elements How is it organized • Organized into rows called periods • Organized into columns called groups(also called families) • Arranged in numerical order by the atomic number • Also arranged other ways (metals, nonmetals, metalloids, etc.)

  5. SPI 0807.9.9 Periodic Table Notes Science . Info in each rectangle Atomic number • is the number of protons! • matches the number of electrons! • Is a whole number • Usually but not always at the top Chemical symbol Element name Atomic mass • Is the average mass of a sample of hydrogen atoms • Is a decimal number • Usually but not always at the bottom 1 H Hydrogen 1.0

  6. How to determine the number of neutrons Lithium Atom Protons: Three 3 Electrons: Three Neutrons: ?????? Li Two Simple Steps: Step 1: Round the atomic mass to the nearest whole number Example: 6.941 rounds to 7 Step 2: Subtract the atomic number from this rounded number (Atomic number is 3) Example: 7 - 3 = 4 neutrons Atomic Number Lithium 6.941 Atomic Mass Lithium atoms have 4 neutrons

  7. SPI 0807.9.9 Periodic Table Science Review . Answer these questions on your paper (1) What are elements? Elements are the different types of atoms (2) What are the subatomic particles of an atom? Protons, neutrons, and electrons • What are the charges of each of the particles? Protons = positive Neutrons = no charge Electrons = negative (4) What is an atomic number? It is the number of protons in an atom (5) What is atomic mass? It is the average mass of a sample of the same kind of atoms

  8. SPI 0807.9.9 Periodic Table Science Review . Write down your answers What is oxygen's atomic number and atomic mass? 8 O Atomic Number Oxygen 16.0 Atomic Mass

  9. SPI 0807.9.9 Periodic Table Science Review . Write down your answers How many protons and electrons does each atom of oxygen have? 8 O Atomic Number …has 8 protons …also has 8 electrons Oxygen 16.0 The number of protons and electrons are always the same.

  10. SPI 0807.9.9 Periodic Table Science Notes . Write down your answers How many neutrons does each atom of oxygen have? 8 O Two Simple Steps: 1) Round the atomic mass to the nearest whole number Example: 16.0 rounds to 16 2) Subtract the atomic number from this rounded number Reminder: Atomic number is 8 Example: 16 - 8 = 8 neutrons Atomic Number Oxygen 16.0 Atomic Mass Oxygen atoms have 8 neutrons

  11. Review Questions SPI 0807.9.9 Periodic Table Science How many neutrons? 1) Round the atomic mass 85.5 rounds up to 86 2) Subtract the atomic number from the atomic mass. 86 minus 37 = 49 neutrons Atomic Number Atomic Mass

  12. SPI 0807.9.9 Periodic Table The number of protons and electrons are always the same. Science Questions How many neutrons? 1) Round the atomic mass 20.2 rounds down to 20 2) Subtract the atomic number from the atomic mass. 20 minus 10 = 10 neutrons Atomic Number (number of protons) Atomic Mass

  13. SPI 0807.9.9 Periodic Table Science Questions Atomic Mass (Bromine) Atomic Number (Iodine)

  14. SPI 0807.9.9 Periodic Table The number of protons and electrons are always the same. Science Questions How many neutrons? 1) Round the atomic mass 47.9 rounds up to 48 2) Subtract the atomic number from the atomic mass. 48 minus 22 =26 neutrons Atomic Mass Atomic Number (number of protons)

  15. SPI 0807.9.9 Periodic Table Science Questions Atomic Number (number of protons) Atomic Mass (Bromine)

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