Chem bonding Flashcards
(17 cards)
Compound
Is a substance that is made up of two or more different elements combined together chemically
Octet rule
When bonding occurs atoms tend to reach an electron arrangement with eight electrons in the outermost energy level
Ion
Charged atom or group of atoms
Ionic bond
Force of attraction between oppositely charged ions in a compound formed from complete transfer of electrons
Transition metal
Forms at least one ion with a partially filled d sublevel
Molecule
Group of atoms joined together smallest particle of an element or compound
Valency
Number of atoms of hydrogen or any other monovalent elements with which each atom of the element combines
Sigma bond
Formed by head-on overlap of two orbitals
Electronegativity
Relative attraction that an atom in a molecule has for the shared pair of electrons in a covalent bond
Pi bond
Formed by the sideways overlap of p orbitals
Polar covalent bond
Bond in which there is unequal sharing of the pair(s) of electrons. This causes one end of the bond to be slightly positive and the other slightly negative
Intermolecular bonding
Bonding that takes place within a molecule holds atoms together
Intermolecular forces
Forces of attraction the exist between molecules e.g van der walls dipole-dipole hydrogen bonding
Van der walls
Weak attractive forces that result in temporary dipoles between non-polar molecules
Dipole-Dipole
Forces of attraction between the negative pole of one polar molecule and the positive pole of another polar molecule
Hydrogen bonding
Hydrogen bonded to oxygen fluorine or nitrogen strongest type
Transition metals characteristics
Good conductors of heat
High melting point
