Physical Science Chapter 20

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Presentation transcript:

Physical Science Chapter 20 Covalent Bonds Physical Science Chapter 20

Covalent Bonds The attraction that forms between atoms when they share electrons is known as a covalent bond. A neutral particle that forms as a result of electron sharing is called a molecule A covalent bond forms between two nonmetals.

Covalent Bond Atoms sharing one set of electrons forms a single bond Atoms can share more than one set of atoms to form multiple bonds

Polarity Molecules do not always share electrons equally Depends on the: Size of the atom Total number of electrons the atom contains

Naming Covalent Compounds

You’ll need to know these prefixes Number of atoms Prefix 1 Mono- 2 Di- 3 Tri- 4 Tetra- 5 Penta- 6 Hexa- 7 Hepta- 8 Octa-

Naming Binary Covalent compounds Write the name of the first element in the formula. Then add the appropriate prefix to say how many you have of each. CO2 Carbon (no prefix since it has a subscript of 1) Write the name of the second element with the ending of –ide with the appropriate prefix to say how many you have. Oxygen = Oxide = dioxide All together = Carbon dioxide Special Notes: the last vowel of a prefix is dropped if the element begins with a vowel Often the prefix mono- will be omitted

Name these compounds N2O CF4 CO2

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