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Mark Penningtonon 9 December 2011
Transcript of Covalent Bonding
by the sharing of pairs of electrons between atoms, and other covalent
bonds. In short, the attraction-to-repulsion stability that forms between
atoms when they share electrons is known as covalent bonding. Covalent bonds are the strongest type of chemical bond
and are created between atoms with similar electronegativity Equal sharing of electrons Unequal sharing of electrons Naming
Molecular Compounds Binary molecular compounds
are composed of only two elements Some have
generic names ...
Water Simple binary compounds consist of only a few atoms. Systematic naming of these compounds follow rules: Rules
Rule 4. Greek prefixes (see the Table provided at the bottom of this page) are used to indicate the number of atoms of each nonmetal element in the chemical formula for the compound.
Exception: if the compound contains one atom of the element that is written first in the name, the prefix "mono-" is not used.
Note: when the addition of the Greek prefix places two vowels adjacent to one another, the "a" (or the "o") at the end of the Greek prefix is usually dropped; e.g., "nonaoxide" would be written as "nonoxide", and "monooxide" would be written as "monoxide". The "i" at the end of the prefixes "di-" and "tri-" are never dropped. Rule 1. The element with the lower group number is written first in the name; the element with the higher group number is written second in the name.
Exception: when the compound contains oxygen and a halogen, the name of the halogen is the first word in the name.
Rule 2. If both elements are in the same group, the element with the higher period number is written first in the name.
Rule 3. The second element in the name is named as if it were an anion, i.e., by adding the suffix -ide to the name of the element.