Intermolecular Bonding Flashcards
What is a covalent bond?
In a covalent bond, atoms share pairs of electrons. The covalent bond is a result of two positive nuclei being held together by their common attraction for the shared pair of electrons.
What is a pure covalent bond?
Pure covalent bonds exist between two atoms with the same electronegativities. A pure covalent bond has no ionic character at all.
Diatomic elements are good examples of pure covalent bonds where the electrons are evenly shared between both nuclei.
What is a polar covalent bond?
Polar covalent bonds are formed when the attraction of the atoms for the pair of bonding
electrons is different. Delta positive (δ+) and delta negative (δ-) notation can be used to
indicate the partial charges on atoms, which give rise to a dipole.
What does polar covalent bonding cause?
it caused a dipole to form as one side of the molecule is now slightly negative, and one side is slighly positive.
What is ionic bonding?
Ionic bonds are usually (but not always) formed between a metal and non-metal with a large difference in electronegativity, eg Sodium Chloride. More of a difference in electronegativity than in Polar covalent.
How does an ionic bond form.
One atom completely pulls an electron from another, causing it to become a negative ion, leaving the other atom a negative ion. The ionic bond is the electrostatic force of attraction between a metal ion and a non-metal ion.
What is the bonding continium and where does each type lie?
Zero Low High Pure Covalent Polar Covalent Ionic
