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Ions 11/3/2008

Ions 11/3/2008 . Use your periodic table to answer the following questions about Sodium (Na) and Chlorine ( Cl ): What is the atomic number? What is the atomic mass? How many protons do they have? How many electrons do they have? How many neutrons do they have?. Review .

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Ions 11/3/2008

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  1. Ions 11/3/2008 • Use your periodic table to answer the following questions about Sodium (Na) and Chlorine (Cl): • What is the atomic number? • What is the atomic mass? • How many protons do they have? • How many electrons do they have? • How many neutrons do they have?

  2. Review • In an uncharged atom, the number of protons is equal to the number of ________________. • Electrons • An uncharged atoms has NO charge. Why? • Protons = electrons

  3. Ions 10/30/08 Uncharged Atoms Protons = electrons NO charge (zero charge) • In an uncharged atom, the number of protons is the same as the number of ____________. • electrons • An uncharged atom has NO charge. Why? • Protons = electrons

  4. Ions • Electrons can be added or removed from an atom. • If the number of electrons is not equal to the number of protons, the atom is no longer uncharged

  5. Ions • The ions of an element have an overall charge • The number of protons does not equal the number of electrons • Atomic number always tells us the number of protons • The number of electrons is what changes

  6. Ions 10/30/08 Uncharged Atoms Protons = electrons NO charge (zero charge) • In an uncharged atom, the number of protons is the same as the number of ____________. • electrons • An uncharged atom has NO charge. Why? • Protons = electrons Ions Ions have an overall charge Protons  electrons # of protons = atomic number # of electrons changes

  7. Ions • Overall Charge = # protons - # electrons • If an ion has more protons than electrons, the overall charge will be positive. • If an ion has more electrons than protons, the overall charge will be negative.

  8. Ions 10/30/08 Uncharged Atoms Protons = electrons NO charge (zero charge) • In an uncharged atom, the number of protons is the same as the number of ____________. • electrons • An uncharged atom has NO charge. Why? • Protons = electrons Ions Ions have an overall charge Protons  electrons # of protons = atomic number # of electrons changes Overall Charge Overall charge = # protons - # electrons protons  electrons overall charge is positive protons  electron  overall charge is negative

  9. Ions 10/30/08 Ex. 1: If an atom has 18 protons, 18 neutrons, and 17 electrons, what will the overall charge be? Overall Charge Examples • In an uncharged atom, the number of protons is the same as the number of ____________. • electrons • An uncharged atom has NO charge. Why? • Protons = electrons • Overall charge = protons – electrons • = 18p+ - 17e- • = +1 Ex. 2: If an atom has 18 protons, 18 neutrons, and 19 electrons, what will the overall charge be? • Overall charge = protons – electrons • = 18p+ - 19e- • = -1

  10. Ions 10/30/08 Ex. 3: If an atom has 18 protons, 18 neutrons, and 18 electrons, what will the overall charge be? Overall Charge Examples • In an uncharged atom, the number of protons is the same as the number of ____________. • electrons • An uncharged atom has NO charge. Why? • Protons = electrons • Overall charge = protons – electrons • = 18p+ - 18e- • = 0 • NOT an ion (protons = electrons)

  11. Ions • Ions are abbreviated with the element symbol and the charge. • Ex. 1: An ion of Potassium (K) has a +1 charge: it is abbreviated as K+. • Ex. 2: An ion of Iodine (I) has a -1 charge: it is abbreviated as

  12. Ions • Ions are abbreviated with the element symbol and the charge. • Ex. 1: An ion of Potassium (K) has a +1 charge: it is abbreviated as K+. • Ex. 2: An ion of Iodine (I) has a -1 charge: it is abbreviated as I-

  13. Ions 10/30/08 Ex. 3: If an atom has 18 protons, 18 neutrons, and 18 electrons, what will the overall charge be? Overall Charge Examples • In an uncharged atom, the number of protons is the same as the number of ____________. • electrons • An uncharged atom has NO charge. Why? • Protons = electrons • Overall charge = protons – electrons • Overall charge = 18p+ - 18e- • Overall charge = 0 • NOT an ion (protons = electrons) Symbols for ions Element symbol + charge Potassium (K) with a +1 charge = K+ Iodine (I) with a -1charge = I-

  14. Ions • An ion of Sulfur has a -2 charge: it is abbreviated as____.

  15. Ions • An ion of Sulfur has a -2 charge: it is abbreviated as S-2. • An ion of Calcium has a +2 charge: it is abbreviated as _____

  16. Ions • An ion of Sulfur has a -2 charge: it is abbreviated as S-2. • An ion of Calcium has a +2 charge: it is abbreviated as Ca+2

  17. Calculating Subatomic Particles • Atomic number = protons • # Electrons = # Protons – Overall Charge

  18. Ions 10/30/08 Ex. 1: If an ion has an atomic number of 13, a mass number of 26, and an overall charge of +1, find the following information: Examples • In an uncharged atom, the number of protons is the same as the number of ____________. • electrons • An uncharged atom has NO charge. Why? • Protons = electrons • # Protons:

  19. Ions 10/30/08 Ex. 1: If an ion has an atomic number of 13, a mass number of 26, and an overall charge of +1, find the following information: Examples • In an uncharged atom, the number of protons is the same as the number of ____________. • electrons • An uncharged atom has NO charge. Why? • Protons = electrons • # Protons: 13 • # Electrons:

  20. Ions 10/30/08 Ex. 1: If an ion has an atomic number of 13, a mass number of 26, and an overall charge of +1, find the following information: Examples • In an uncharged atom, the number of protons is the same as the number of ____________. • electrons • An uncharged atom has NO charge. Why? • Protons = electrons • # Protons: 13 • # Electrons: # protons – charge • 13 – (1) • 12

  21. Ions 10/30/08 Ex. 1: If an ion has an atomic number of 13, a mass number of 26, and an overall charge of +1, find the following information: Examples • In an uncharged atom, the number of protons is the same as the number of ____________. • electrons • An uncharged atom has NO charge. Why? • Protons = electrons • # Protons: 13 • # Electrons: # protons – charge • 13 – (1) • 12 • # neutrons:

  22. Ions 10/30/08 Ex. 1: If an ion has an atomic number of 13, a mass number of 26, and an overall charge of +1, find the following information: Examples • In an uncharged atom, the number of protons is the same as the number of ____________. • electrons • An uncharged atom has NO charge. Why? • Protons = electrons • # Protons: 13 • # Electrons: # protons – charge • 13 – (1) • 12 • # neutrons: mass # - # protons • 26 – 13 • 13

  23. Examples (Left Page) • Ex. 2: If an ion has an atomic number of 13, a mass number of 26, and an overall charge of -2, find the following information: • # Protons: • # Electrons: • # Neutrons:

  24. Examples (Left Page) • Ex. 2: If an ion has an atomic number of 13, a mass number of 26, and an overall charge of -2, find the following information: • # Protons: 13 • # Electrons: • # Neutrons:

  25. Examples (Left Page) • Ex. 2: If an ion has an atomic number of 13, a mass number of 26, and an overall charge of -2, find the following information: • # Protons: 13 • # Electrons: 15 • # Neutrons:

  26. Examples (Left Page) • Ex. 2: If an ion has an atomic number of 13, a mass number of 26, and an overall charge of -2, find the following information: • # Protons: 13 • # Electrons: 15 • # Neutrons: 13

  27. Examples (Left Page) • Ex. 2: If an ion has an atomic number of 13, a mass number of 26, and an overall charge of -2, find the following information: • # Protons: 13 • # Electrons: 15 • # Neutrons: 13 • Ex. 3: If an ion has an atomic number of 13, a mass number of 26, and an overall charge of -1, find the following information: • # Protons: • # Electrons: • # Neutrons:

  28. Examples (Left Page) • Ex. 2: If an ion has an atomic number of 13, a mass number of 26, and an overall charge of -2, find the following information: • # Protons: 13 • # Electrons: 15 • # Neutrons: 13 • Ex. 3: If an ion has an atomic number of 13, a mass number of 26, and an overall charge of -1, find the following information: • # Protons: 13 • # Electrons: • # Neutrons:

  29. Examples (Left Page) • Ex. 2: If an ion has an atomic number of 13, a mass number of 26, and an overall charge of -2, find the following information: • # Protons: 13 • # Electrons: 15 • # Neutrons: 13 • Ex. 3: If an ion has an atomic number of 13, a mass number of 26, and an overall charge of -1, find the following information: • # Protons: 13 • # Electrons: 14 • # Neutrons:

  30. Examples (Left Page) • Ex. 2: If an ion has an atomic number of 13, a mass number of 26, and an overall charge of -2, find the following information: • # Protons: 13 • # Electrons: 15 • # Neutrons: 13 • Ex. 3: If an ion has an atomic number of 13, a mass number of 26, and an overall charge of -1, find the following information: • # Protons: 13 • # Electrons: 14 • # Neutrons: 13

  31. Examples (Left Page) • Ex. 4: Using your periodic table, find the following information for K+: • Atomic #: • Overall Charge: • # p+: • #e-: • # n0: • Mass #:

  32. Examples (Left Page) • Ex. 4: Using your periodic table, find the following information for K+: • Atomic #: 19 • Overall Charge: • # p+: • #e-: • # n0: • Mass #:

  33. Examples (Left Page) • Ex. 4: Using your periodic table, find the following information for K+: • Atomic #: 19 • Overall Charge: +1 • # p+: • #e-: • # n0: • Mass #:

  34. Examples (Left Page) • Ex. 4: Using your periodic table, find the following information for K+: • Atomic #: 19 • Overall Charge: +1 • # p+: 19 • #e-: • # n0: • Mass #:

  35. Examples (Left Page) • Ex. 4: Using your periodic table, find the following information for K+: • Atomic #: 19 • Overall Charge: +1 • # p+: 19 • #e-: 18 • # n0: • Mass #:

  36. Examples (Left Page) • Ex. 4: Using your periodic table, find the following information for K+: • Atomic #: 19 • Overall Charge: +1 • # p+: 19 • #e-: 18 • # n0: 20 • Mass #:

  37. Examples (Left Page) • Ex. 4: Using your periodic table, find the following information for K+: • Atomic #: 19 • Overall Charge: +1 • # p+: 19 • #e-: 18 • # n0: 20 • Mass #: 39

  38. Examples (Left Page) • Using your periodic table, find the following information for S2-: • Atomic #: • Overall Charge: • # p+: • #e-: • # n0: • Mass #:

  39. Examples (Left Page) • Using your periodic table, find the following information for S2-: • Atomic #: 16 • Overall Charge: • # p+: • #e-: • # n0: • Mass #:

  40. Examples (Left Page) • Using your periodic table, find the following information for S2-: • Atomic #: 16 • Overall Charge: -2 • # p+: • #e-: • # n0: • Mass #:

  41. Examples (Left Page) • Using your periodic table, find the following information for S2-: • Atomic #: 16 • Overall Charge: -2 • # p+: 16 • #e-: • # n0: • Mass #:

  42. Examples (Left Page) • Using your periodic table, find the following information for S2-: • Atomic #: 16 • Overall Charge: -2 • # p+: 16 • #e-: 18 • # n0: • Mass #:

  43. Examples (Left Page) • Using your periodic table, find the following information for S2-: • Atomic #: 16 • Overall Charge: -2 • # p+: 16 • #e-: 18 • # n0: 16 • Mass #:

  44. Examples (Left Page) • Using your periodic table, find the following information for S2-: • Atomic #: 16 • Overall Charge: -2 • # p+: 16 • #e-: 18 • # n0: 16 • Mass #: 32

  45. SUMMARY • Take 3 minutes to write a summary of today’s notes (I will be stamping). • Work on your HW Packet – ions section!

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