1. Chapter 7 Ionic and Metallic Bonding 7.1 Ions 7.2 Ionic Bonds and
Ionic Compounds
7.3 Bonding in Metals
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2. Write noble gas configurations for elements listed on the handout.
Valence Electrons
Do Now:
Write noble gas configurations for elements listed on the handout.
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3. These are the electrons involved in bonding.
Valence Electrons
Valence electrons - Electrons in the highest occupied energy level of an element’s atoms.
These are the electrons involved in bonding.
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4. valence electrons = group number (except He)
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5. Electron Dot Structures:
Interpret Data
Electron Dot Structures:
- Show valence electrons as dots around element symbol. - Also called Lewis structures.
Electron Dot Structures of Some Group A Elements
Period
Group 1A 2A 3A 4A 5A 6A 7A 8A 1 2 3 4
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6. Determining the Number of Valence Electrons for the following atomsCs F O Xe
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7. Determining the Number of Valence Electrons for the following atoms
Cs - 1
F - 7
O - 6
Xe - 8
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8. Valence Electrons
The Octet Rule
When forming compounds, atoms tend to achieve the electron configuration of a noble gas.
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9. Group in Periodic Table Will it form a Cation or Anion?
CHEMISTRY & YOU
Do Now:
Complete the table below in your notebook.
Element
Group in Periodic Table
# of Valence
Electrons
Will it form a Cation or Anion?
Ion Charge (i.e. 1+,2-)? Li I S Ca N
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10. Group in Periodic Table Will it form a Cation or Anion?
CHEMISTRY & YOU
Do Now:
Complete the table below in your notebook.
Element
Group in Periodic Table
# of Valence
Electrons
Will it form a Cation or Anion?
Ion Charge (i.e. 1+,2-)? Li 1A 1
Cation 1+ I 7A 7
Anion 1- S 6A 6 2- Ca 2A 2 2+ N 5A 5 3-
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11. Transition: charge can vary
Formation of Cations
Cations
Group 1A: + charge.
Group 2A: 2+ charge.
Transition: charge can vary
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12. Formed by nonmetals and metalloids Name ends in –ide Cl- is chloride
Formation of Anions
Anions
Formed by nonmetals and metalloids
Name ends in –ide
Cl- is chloride
O2– is oxide
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13. How many electrons will each element gain or lose in forming an ion?
a) Magnesium
b) Fluorine
c) Aluminum
d) Oxygen
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14. END OF 7.1
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