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56 Cards in this Set

  • Front
  • Back
What are chemical bonds?
attractive forces that hold molecules together
What does a chemical formula show?
the atoms within a compound
What is the distance between two bonded atoms referred as?
bond length
What do bond angles show?
how the atoms are oriented
What are two different models of compounds.?
1. structural formulas
2. space-filling models
What are chemical bonds?
attractive forces that hold molecules together
What does a chemical formula show?
the atoms within a compound
What do bond length give?
the distance between two atoms
What do bond angles show?
how the atoms are oriented
What are two different models of compounds.?
1. structural formulas
2. space-filling models
What affects the properties of compounds?
structure
What type of compound structures have are strong solids?
Ones with network structures
What are some networks made of?
1. bonded ions
2. molecules
What does the strength of the bond depend on?
the strength of attractions between molecules
Put the following in order of strength.
gases solids liquids
Solids Liquids Gases
Where does bonding take place?
at the outer energy levels of electrons
Diatomic molecules include what?
H O N
What happens when the outer energy levels of electrons bond?
The electron clouds of the two atoms overlap.
What kind of bond is a TRANSFER of electrons?
Ionic
What kind of bond form in crystals anions and cations?
Ionic
What is a bond between metals and nonmetals?
Ionic
What are Ionic compounds called?
formula units
What are some characteristics of Ionic bonds?
1. high melting point
2. usually solids
3. conduct electricity when dissolved in water
What kind of bond is a Sea of electrons?
metallic
What are two characteristics of metallic bonds?
conduct electricity
weak bond
What are Covalent Bonds called?
moleucles
What is a bond between nonmetals and nonmetals?
covalent
What is a bond where atoms SHARE a pair of electrons
Covalent
What is unequal sharing called?
polar
What are two characteristics of covalent bonds?
1. do not conduct electricity
2. come in solid, liquid, and gas
What happens when valence electrons interact?
Atoms bond
In what type o bonds do Atoms share elements?
covalent bonds
In what type o bonds do Atoms share elements?
covalent bonds
Why do gases take up a lot of space?
Gases molecules have very little attraction to one another.
Why do atoms often join?
They join so they have an outermost energy level that is full of electrons.
What kind of substance do molecules have the strongest attractions to one another?
A solid
How does a compound differ from a mixture?
a compound always contains the same elements in the same proportion.
If you were to compare bonds that hold atoms together, what do they behave most like?
flexible springs
What does an ionic bond form between?
ions with opposite charges
What do covalent bonds form between?
nonmetal atoms
Why is copper a good conductor of electricity?
copper's electrons are free to move from atom to atom
What is the anion formed from an oxgen atom called?
oxide ion
When do atoms bond in compounds?
When their valence electrons interact
What do organic compounds contain?
carbon and hydrogen
What is a compound called that is made of hydrogen and carbon?
hydrocarbon
What have a single covalent bonds?
Alkanes
What have at least one double covalent bond?
Alkenes
What group do all alcohols have?
OH
What are large organic compounds made of small repeating units
Polymers
What are some examples of polymers?
Wood, cotton, and DNA
Where do you find Biochemical compounds?
In Living Things
What is the biochemical compound carbohydrates?
sugars
What are polymers that are made of amino acids?
proteins
What is DNA?
A nucleic acid
What are the four bases of DNA?
Adenine
Thymine
Guanine
Cytosine
Mr. Luring Int Science
Chapter 4
Cut apart and STUDY