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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
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
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
slide3

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
slide4
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
slide5
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
slide6

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

slide7
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.
slide8

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

slide9

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
slide10

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)
slide11
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
slide12
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-
slide13

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-

slide14
Ions
  • An ion of Sulfur has a -2 charge: it is abbreviated as____.
slide15
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 _____
slide16
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
calculating subatomic particles
Calculating Subatomic Particles
  • Atomic number = protons
  • # Electrons = # Protons – Overall Charge
slide18

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:
slide19

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:
slide20

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
slide21

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:
slide22

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
examples left page
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:
examples left page1
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:
examples left page2
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:
examples left page3
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
examples left page4
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:
examples left page5
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:
examples left page6
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:
examples left page7
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
examples left page8
Examples (Left Page)
  • Ex. 4: Using your periodic table, find the following information for K+:
    • Atomic #:
    • Overall Charge:
    • # p+:
    • #e-:
    • # n0:
    • Mass #:
examples left page9
Examples (Left Page)
  • Ex. 4: Using your periodic table, find the following information for K+:
    • Atomic #: 19
    • Overall Charge:
    • # p+:
    • #e-:
    • # n0:
    • Mass #:
examples left page10
Examples (Left Page)
  • Ex. 4: Using your periodic table, find the following information for K+:
    • Atomic #: 19
    • Overall Charge: +1
    • # p+:
    • #e-:
    • # n0:
    • Mass #:
examples left page11
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 #:
examples left page12
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 #:
examples left page13
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 #:
examples left page14
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
examples left page15
Examples (Left Page)
  • Using your periodic table, find the following information for S2-:
    • Atomic #:
    • Overall Charge:
    • # p+:
    • #e-:
    • # n0:
    • Mass #:
examples left page16
Examples (Left Page)
  • Using your periodic table, find the following information for S2-:
    • Atomic #: 16
    • Overall Charge:
    • # p+:
    • #e-:
    • # n0:
    • Mass #:
examples left page17
Examples (Left Page)
  • Using your periodic table, find the following information for S2-:
    • Atomic #: 16
    • Overall Charge: -2
    • # p+:
    • #e-:
    • # n0:
    • Mass #:
examples left page18
Examples (Left Page)
  • Using your periodic table, find the following information for S2-:
    • Atomic #: 16
    • Overall Charge: -2
    • # p+: 16
    • #e-:
    • # n0:
    • Mass #:
examples left page19
Examples (Left Page)
  • Using your periodic table, find the following information for S2-:
    • Atomic #: 16
    • Overall Charge: -2
    • # p+: 16
    • #e-: 18
    • # n0:
    • Mass #:
examples left page20
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 #:
examples left page21
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
summary
SUMMARY
  • Take 3 minutes to write a summary of today’s notes (I will be stamping).
  • Work on your HW Packet – ions section!