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Covalent Compounds

Covalent Compounds. Naming and Formula Writing. Covalent Compounds. Are made up of two NONMETALS. (Both elements are from the right of the step line (green elements shown)). One – Mono Two – Di Three – Tri Four – Tetra Five – Penta. Six – Hexa Seven – Hepta Eight – Octo

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Covalent Compounds

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  1. Covalent Compounds Naming and Formula Writing

  2. Covalent Compounds • Are made up of two NONMETALS.(Both elements are from the right of the step line (green elements shown)).

  3. One – Mono Two – Di Three – Tri Four – Tetra Five – Penta Six – Hexa Seven – Hepta Eight – Octo Nine – Nona Ten – Deca Prefixes you need to know

  4. Rules for Covalent Compounds #1 – If the compound has only one atom of the first element (no subscript), we just name it normally (do not write mono….). If there are two or more atoms of the first element, we use a prefix to tell how many there are (the subscript). #2 – For the second element, we ALWAYS use a prefix (even mono) and we change then ending of the element to –ide.

  5. For Example… • What would you call this compound: CO2? • Carbon Dioxide • We do not call it Monocarbon Dioxide

  6. Try these • SiCl4 • C3H9 • SO2 • N2O5 • Silicon tetrachloride • Tricarbon nonahydride • Sulfur dioxide • Dinitrogen pentoxide • (you can drop off the –a from penta here so you don’t have to put two vowels together.)

  7. Can you do it in reverse? • What is the chemical formula for Dinitrogen Monoxide? • N2O • Remember, when using prefixes, it tells you the actual subscript, you do not need to determine charges, or criss-cross, etc.

  8. Try these… • Carbon disulfide • Dinitrogen monosulfide • Diphosphorus hexaoxide • Tricarbon octachloride • CS2 • N2S • P2O6 • C3Cl8

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