Ionic and molecular compounds

Ionic and molecular compounds - they become mobile when the...

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Ionic and molecular compounds 4 Molecular compounds are made of molecules . o each molecule contains anywhere from two atoms ( diatomic molecules ) to thousands (biological molecules). o each molecule has the same element composition and properties as the compound. o synonym: covalent compound o examples: H 2 O, CO 2 , C 6 H 12 O 6 , NH 3 , CH 4 Ionic compounds are made of positive ions ( cations ) and negative ions ( anions ). o cations combine with anions in just the right numbers to give an electrically neutral compound. o metals form cations easily, and nonmetals form anions, so metal/nonmetal compounds are often ionic o cations and anions pack into orderly arrays in solids;
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Unformatted text preview: they become mobile when the compound melts o individual molecules don't normally exist! an ion pair an ion crystal o examples: NaCl, KBr, Na 2 S, MgBr 2 o synonym: salts Table: Comparing ionic and molecular compounds. Molecular compounds Ionic compounds smallest particles molecules ions elements present close on the periodic table widely separated on the periodic table electrical conductivity poor good, when melted or dissolved state at room temperature solid, liquid, or gas solid other names covalent compounds salts...
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This note was uploaded on 11/22/2011 for the course CHEMISTRY CHM1025 taught by Professor Laurachoudry during the Fall '10 term at Broward College.

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Ionic and molecular compounds - they become mobile when the...

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