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Alchemy Unit – Investigation II

Alchemy Unit – Investigation II. Protons, Neutrons, Electrons, And Mass. Admit Slip. What is calcium’s symbol? What is the atomic number of calcium? What is the number of protons? What is the atomic mass of calcium?. The Big Question. How are the different atoms alike and different?.

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Alchemy Unit – Investigation II

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  1. Alchemy Unit – Investigation II Protons, Neutrons, Electrons, And Mass

  2. Admit Slip • What is calcium’s symbol? • What is the atomic number of calcium? • What is the number of protons? • What is the atomic mass of calcium?

  3. The Big Question • How are the different atoms alike and different?

  4. Today’s Objectives Students will be able to: • Explain how the periodic table of elements is organized. • Use the periodic table to find the atomic mass, atomic number, number of protons, electrons, and neutrons

  5. Agenda • Admit Slip • Periodic Table Review • Notes • Exit Slip • Homework

  6. Name Atomic Mass Symbol Atomic Number

  7. Protons, Neutrons, and Electrons 9/18/13 Atomic number =# of protons # of protons = # of electrons Positive(+) charge =Negative(-) charge. This is why atoms are neutral, with a 0 charge overall!

  8. Mass numberis the number of protons plus the number of neutrons for each element. • It is equal to the atomic mass rounded to the nearest whole number. • mass number = protons + neutrons • mass number atomic mass

  9. If mass number = protons + neutrons, how do you find the neutrons from the mass and protons? • To find the number of neutrons, you round off the atomic mass to a whole number and then subtract the protons. Neutrons = mass number – protons.

  10. Classwork/Exit Slip

  11. Classwork/Exit Slip

  12. Homework • # 1 – 5 Due tomorrow

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