The suffix -ide is always added to the second element. Molecular compounds involve atoms joined by covalent bonds and can be represented by a variety of formulas. The prefix mono is never used with the first element. Chemical compounds can generally be classified into two broad groups: molecular compounds and ionic compounds. These bonds are dependent upon the number of atoms sharing electrons and therefore are named using numeric prefixes to identify atom counts. Molecular Compounds also known as covalent compounds involve bonds between two non-metals. The iron ion is +2 to balance the -2 oxide ion Writing and balancing net ionic equations can be challenging but if you carefully follow the correct steps you will be successful. The iron ion is +3 to balance the -2 oxide ion Unformatted text preview: 122 SCHAU: Molecular vs. #Fe_2O_3# is ferric oxide or Iron III oxide Examples would include #Fe^+3# is ferric and #Fe^+2# is ferrous, #Sn^+4# is stannic and #Sn^+2# is stannous. The -ic suffix is used for the greater charge and -ous for the lesser charge. When a metal and non-metal form an ionic molecule the metal will retain the element name and the non-metal will taken the suffix -ide.įor Transition Metals we are reminded that these elements can carry more than one charge and can be named with stock naming using roman numerals to indicate the ionic charge or common naming using the suffixes -ic and -ous. Elements can be classified as metals, metalloids, and nonmetals, or as a main. Metallic crystal - Metallic crystals consist of metal cations surrounded by a 'sea' of mobile valence electrons (see figure below). The naming of ionic compounds is dependent upon the type of ionic molecule formed from alkali metals, alkaline earth metals or transition metals. Elements in the same group of the periodic table have similar chemical properties. Ionic compounds do not conduct electricity as solids, but do conduct electricity when molten or in aqueous solution.
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