CHAPTER
NEW CHAPTER
Chemical Bonds and Compounds
the BIG idea
The properties of compounds depend on their atoms and
chemical bonds.
2.1 Elements combine to form compounds.
2.2 Chemical bonds hold compounds together.
2.3 Substances’ properties depend on their bonds.
CHAPTER OUTLINE
CHAPTER RESOURCES
2.1
CHAPTER HOME
KEY CONCEPT
Elements combine to form compounds.
• Compounds have different properties from the
elements that made them.
• Atoms combine in predictable numbers.
+
calcium (Ca)
+
VOCABULARY
chemical formula
subscript
=
chlorine
(Cl2)
=
calcium
chloride
(CaCl2)
CHAPTER
RESOURCES
SECTION
OUTLINE
2.2
CHAPTER HOME
KEY CONCEPT
Chemical bonds hold compounds together.
• Chemical bonds between atoms involve electrons.
VOCABULARY
• Atoms can transfer electrons.
ionic bond
• Atoms can share electrons.
covalent bond
• Chemical bonds give all materials their structure.
molecule
polar covalent
bond
polar covalent
bond
ionic bond
covalent bond
CHAPTER
RESOURCES
SECTION
OUTLINE
2.2
CHAPTER HOME
KEY CONCEPT
Chemical bonds hold compounds together.
• Chemical bonds between atoms involve electrons.
VOCABULARY
• Atoms can transfer electrons.
ionic bond
• Atoms can share electrons.
covalent bond
• Chemical bonds give all materials their structure.
molecule
polar covalent
bond
VISUALIZATON
Examine how electrons
move in a polar covalent
molecule.
VISUALIZATION
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Watch an animation showing
ionic and covalent bonding.
CHAPTER
RESOURCES
SECTION
OUTLINE
2.3
CHAPTER HOME
KEY CONCEPT
Substances’ properties depend on their bonds.
• Metals have unique bonds.
• Ionic and covalent bonds give compounds certain
properties.
• Bonds can make the same element look different.
copper
diamond
fragment
graphite fragment
VOCABULARY
metallic bond
CHAPTER
RESOURCES
SECTION
OUTLINE
2.1
KEY CONCEPT
CHAPTER HOME
Elements combine to form compounds.
I. Elements combine to form compounds.
A. Compounds have different properties from the
elements that make them.
VOCABULARY
chemical formula
subscript
B. Atoms combine in predictable numbers.
1. Chemical Formulas
2. Same Elements, Different Compounds
CHAPTER
RESOURCES
KEY CONCEPT
SUMMARY
2.2
CHAPTER HOME
KEY CONCEPT
Chemical bonds hold compounds together.
II. Chemical bonds hold compounds together.
VOCABULARY
ionic bond
A. Chemical bonds between atoms involve
electrons.
covalent bond
B. Atoms can transfer electrons.
molecule
1. Ionic Bonds
2. Names of Ionic Compounds
polar covalent
bond
C. Atoms can share electrons.
1. Covalent Bonds
2. Polar Covalent Bonds
D. Chemical bonds give all materials their
structures.
1. Ionic Compounds
2. Covalent Compounds
CHAPTER
RESOURCES
KEY CONCEPT
SUMMARY
2.3
KEY CONCEPT
CHAPTER HOME
Substances’ properties depend on their bonds.
III. Substances’ properties depend on their bonds.
A. Metals have unique bonds.
VOCABULARY
metallic bond
B. Ionic and covalent bonds give compounds
certain properties.
C. Bonds can make the same element look
different.
CHAPTER
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KEY CONCEPT
SUMMARY
CHAPTER HOME
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