atomic structure and bonding bonding. specific learning outcomes enter here
TRANSCRIPT
Covalent and ionic bonding
COVALENT BOND
Definition: A covalent bond is a chemical link between two
atoms in which electrons are shared between them.
Examples: There is a covalent bond between the oxygen
and each hydrogen in a water molecule (H2O). Each of the
covalent bonds contains two electrons - one from a hydrogen
atom and one from the oxygen atom. Both atoms share the
electrons.
Covalent and ionic bonding
IONIC BOND
Definition: A chemical link between two atoms caused by
the electrostatic force between oppositely-charged ions in an
ionic compound.
Examples: There is an ionic bond between the sodium and
chloride ions in table salt, NaCl.
Lewis Diagrams Electron dot diagrams, sometimes called Lewis dot diagrams,
were first used by Gilbert N. Lewis in 1916.
These diagrams are used as a shorthand notation to show
the number of valence electrons in an atom.
More complicated versions can be used to show the bond
between different atoms in a molecule.
Activities
• Draw the dots (page 16)
Level 2 Chemistry Theory Workbook
I think chemistry is beryllium!
Activities
• Dotty again – page 17• Dot to Dot – page 17 (First 8 questions)• Dotty Eyed by Now – page 19
Level 2 Chemistry Theory Workbook
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Coordinate covalent bonding (Dative Bonding) In the formation of a simple covalent bond, each atom
supplies one electron to the bond - but that doesn't have to
be the case.
A co-ordinate bond (also called a dative covalent bond) is a
covalent bond (a shared pair of electrons) in which both
electrons come from the same atom.
Examples include:Sulfur dioxide & Sulfur trioxide