1 / 10

Naming Covalent (Molecular) Compounds

Naming Covalent (Molecular) Compounds. Properties of Covalently Bonded Compounds. Usually TWO NONMETALS bonded together Two nonmetals share electrons between them Can be Gases, Liquids or “squishy” solids. Generally have LOW melting and boiling points Do not conduct electricity well

eliot
Download Presentation

Naming Covalent (Molecular) Compounds

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Naming Covalent (Molecular) Compounds

  2. Properties of Covalently Bonded Compounds • Usually TWO NONMETALS bonded together • Two nonmetals share electrons between them • Can be Gases, Liquids or “squishy” solids. • Generally have LOW melting and boiling points • Do not conduct electricity well • Usually not very soluble in water

  3. How are covalent compounds different than Ionic ones? Ionic Covalent Nonmetal-Nonmetal bond Electrons are shared Solid, Liquid or gas Low Melting/Boiling pts Do not conduct • Metal – Nonmetal bond • Electrons are transferred • Generally solid • High Melting/Boiling pts • Conduct electricity when melted or dissolved

  4. What is the basic structural unit of a covalent compound? • Covalent compounds form MOLECULES • Bonding between atoms in a molecule is generally much, much stronger than the attraction between different molecules. • Married couples analogy…

  5. How are covalent compounds different than Ionic ones? Ionic Covalent Basic structural unit is the MOLECULE Molecules may attract each other but that attraction is small compared with internal bonding • Basic Structural unit is the “Unit cell” or the “formula unit” • Ions arranged in crystal structure

  6. CO2 • N2O • B2H6 • CH4 • NH3 Naming molecules from their formulas Use the Prefixes… 1 – mono 2 – Di 3 – Tri 4 – Tetr(a) 5 – Pent(a) 6 – Hex(a) 7 – Hept(a) 8 – Oct(a) 9 – Non(a) 10 – Dec(a)

  7. CO2 carbon dioxide • N2O dinitrogen monoxide • B2H6 diboron hexahydride • CH4 carbon tetrahydride commonly known as “Methane” • NH3 nitrogen trihydride commonly known as “Ammonia” Naming molecules from their formulas Use the Prefixes… 1 – mono 2 – Di 3 – Tri 4 – Tetr(a) 5 – Pent(a) 6 – Hex(a) 7 – Hept(a) 8 – Oct(a) 9 – Non(a) 10 – Dec(a)

  8. Carbon monoxide • Sulfur trioxide • Silicon tetrachloride • Diphosphorus pentachloride • Tetraphosphorus triselenide Writing formulas for molecules from their names Use the Prefixes… 1 – mono 2 – Di 3 – Tri 4 – Tetr(a) 5 – Pent(a) 6 – Hex(a) 7 – Hept(a) 8 – Oct(a) 9 – Non(a) 10 – Dec(a)

  9. Carbon monoxide • CO • Sulfur trioxide • SO3 • Silicon tetrachloride • SiCl4 • Diphosphorus pentachloride • P2Cl5 • Tetraphosphorus triselenide • P4Se3 Writing formulas for molecules from their names Use the Prefixes… 1 – mono 2 – Di 3 – Tri 4 – Tetr(a) 5 – Pent(a) 6 – Hex(a) 7 – Hept(a) 8 – Oct(a) 9 – Non(a) 10 – Dec(a)

  10. WARNING! Some of the compounds listed below are NOT covalent. Make sure you don’t use prefixes when naming them. • Name these compounds: CBr4 , N2O5, MgF2 , SeS , • Write formulas for these: Carbon disulfide, Disilicon hexahydride, Potassium carbonate, Dinitrogen tetroxide Practice naming and writing formulas Use the Prefixes… 1 – mono 2 – Di 3 – Tri 4 – Tetr(a) 5 – Pent(a) 6 – Hex(a) 7 – Hept(a) 8 – Oct(a) 9 – Non(a) 10 – Dec(a)

More Related