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Covalent Bonds
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Let’s Recall! Ionic compounds - A bond is formed through an electron transfer between a metal and a non-metal.
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Molecular compounds form when two non-metals share outer electrons.
This bond is known as a covalent bond
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Dogs Teach Chemistry
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Diatomic Molecule Is a molecule that consists of two atoms joined together with a covalent bond. Can be between the same or different atoms (EX) H2, F2, HF
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Covalent Compounds - naming
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Naming – molecular compounds
For molecular compounds, prefixes are used to specify the number of atoms. (Ex) Dinitrogenpentoxide Two (= di) nitrogen atoms Five (=pent) oxygen atoms N2O5
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Prefix Number of atoms Examples mon(o)- 1 carbon monoxide, CO di- 2 carbon dioxide, CO2 tri- 3 sulfurtrioxide, SO3 Tetr(a)- 4 carbon tetrachloride, CCl4 Pent(a)- 5 phosphorus pentafluoride, PF5
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Practice #1 PCl3 1. Write the names of both elements in the same order
Phosphorus Chlorineide 2. Add pre-fixes(Remember prefix “mono” is never used for the first element.) Phosphorus trichloride
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Name the Molecular Compounds
N2O NI2 CCl4 OF2 P2O5 N2O3
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Write the formula for the following molecular compounds
Carbon Monoxide Sulfur Tetrafluoride DinitrogenTetroxide NitrogenTribromide Carbon disulfide
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