bonding Flashcards
Why do bonds form
bonds form between atoms to make them more stable
what happens when bonds break
energy is absorbed
what happens when bonds form
energy is released
What does an ionic bond involve
the transfer of electrons from one atom to another
what must an ionic bond contain
metal and non metal and positive and negative ion
Whats the total charge of an ionic compound
neutral
what are the properties of ionic compounds
hard brittle solids, conduct electricity liquid or aqueous, do not conduct solid, high melting/boiling point
what are covalently bonded substances called
molecular compounds
whats in a covalent bond
two or more nonmetals that share electrons
what are the properties of molecular compounds
soft substances, poor conductor, low melting/boiling point
how do metals achieve a more stable electron configuration
by pooling valence electrons among themselves
What are the properties of metals
mostly solid at STP, luster, malleable & ductile, good conductors, high melting/boiling point
What does an ionic compound with a polyatomic ion have
both ionic and covalent bonds
what does a polar covalent bond have
unequal sharing electron between atoms and different electronegativities
what does a non polar covalent bond have
an equal sharing of electrons between atoms and the same electronegativity
how can you tell how polar a bond is
the larger the difference in electronegativity
what molecule has a symmetrical charge distribution
non polar molecule
what molecule has a asymmetrical charge distribution
polar molecule
what are intermolecular forces
attractive forces between two separate molecules
what properties do strong intermolecular forces lead to
high surface tension, substances being solid or liquid, high melting/ boiling point
