182x Filetype PPTX File size 0.86 MB Source: www.gardencity.k12.ny.us
Chemical Bond A force that holds groups of 2 or more atoms together to make them function as a unit Why? Atoms form bonds to obtain a “noble gas configuration” Octet Rule- Atoms need to have 8 valence electrons Types of Bonds Metallic Bonds: specific only to metals Ionic: results from transfer of electrons Covalent: results from sharing of electrons Coordinate covalent bond: when one atom provides both electrons of the shared pair Metallic Bonding ◦Occurs between like atoms of a metal in the free state ◦Valence e- are mobile (move freely among all metal atoms) ◦Positive ions in a sea of electrons Metallic characteristics ◦ High mp temps, ductile, malleable, shiny ◦ Hard substances ◦ Good conductors of heat and electricity as (s) and (l) Ionic It is the mobile electrons that allow the metal to conduct electricity
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