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21 Cards in this Set

  • Front
  • Back
what kind of process is the breaking of a chemical bond
what kind of process is the forming of a chemical bond
when a chemical bond is formed, does the resulting compound have more or less PE than the substances formed from it and why?
it has has PE b/c energy is always released when a bond is formed
energy released and stability and why
the great the energy released, the greater its stability bc if it is a greater number it takes that same number to break it apart which means its harder to break apart bc it needs more energy and so it is stable
all parts of the atom except the valence electrons-is positively charged
metals and nonmetals losing and gaining electrons
metals lose, nonmetals gain
what kind of metal atoms does metallic boding occur between?
few valence electrons and low ionization energies
chracteristics of metals
hgih melting and boiling pts
good electrical conductivity
liquid at STP
what kind of elements have crsyalline lattice through which electrons flow freely
as electronegativity difference between teh bonds increases, ionic character...
ionic and covalent and electronegativity
greater than 1.7=ionic
less than 1.7=covalent
bonds and melting pts
bonds and electrical conductivity
metallic bonds=good conductivity
ionic and molecular solids=not good
ionic liquids/aqueous=good
hardness and bonds
ionic and metallic=hard
polar molecule
what are the only 3 elements hydrogen bonding occurs with?
flurine, oxygen, and nitrogen
what kind of elements have the sea of mobile electrons
why does water have ushc a high boiling pt?
its bonds are hydrogwen bonds
what are covalent bonds often formed between
two nonmetals atoms
what are ionic bonds often foremd between
a metal and a nonmetal
dipole-dipole attraction
the negative end of one dipole (polar molecule) and the positive end of another attract each other