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of a class of compounds called:
same molecular formula, different structures
2 types of covalent compounds:
- molecular covalent compounds
- network covalent compounds
atoms of different elements held together by covalent bonds
-compound of individual covalently bonded molecules
-three dimentional network of atoms held together by covalent bonds
- molecular covalent compound
- network covalent compound
...contains the symbol for each element present and a subscript number to identify the number of atoms of each element in the molecule
...shows the simplest whole-number ratio of elements in a compound:
network covalent compounds are represented using..
...shows linkages of all atoms in the molecule
how are covalent bonds represented in a structural formula?
lines between the element symbols
...lists the atoms present in groups to indicate connectivity between them:
-does it convey information about the 3D shape of the compound?
- condensed structural formula
- no, only connectivity
...two dimentional representation of a 3D structure that can be easily drawn on paper:
-bonds that lie in the plane of the paper are represented by:
-bonds that lie in front of the plane of the paper:
-bonds that lie behind the plane of the paper
- wedge-and-dash model
- dashed wedges
...interpenetrating spheres represent the relative amount of space occupied by each atom in the molecule:
two common classes of covalent compounds:
-can a compound belong to more than one catagory?
- binary nonmetals
- inorganic acids
...consist of 2 elements, both nonmetals
Prefixes used in naming Binary Nonmetal Compounds:
-binary nonmetal compounds containing only hydrogen and carbon:
-given special names, how are they named?
- according to the number of carbon and hydrogen atoms in the formula
- 1. methane
- 2. ethane
- 3. propane
- 4. butane
- 5. pentane
- 6. hexane
- 7. octane
- 8. decane