ch5 Flashcards
electronegativity
ability of atoms to attract electrons
electronegativity trends
increases left to right
meaning of electron poor
electron doesn’t want to go there
meaning of electron rich
electron wants to go there
what is dipole moment of no polar bond
0-.4
how are electron bonds shared in polar covalent bond
unequally
what binds do carbon and hydrogen form
nonpolar
what happens as dipole moment gets larger
bond becomes more polar
what vectors does dipole moment have
intensity and direction
percent ionic character
measured dipolemoment x100 /dipole moment of electrons were completely transferred
ionic bond has what percent ionic character
50 or greater
what is bond energy
energy required to break a bond
what two atoms can never be central
H and Florine
trend for central atoms
often least electronegative
what is a resonance
when it takes two lewis structures to accurately represent how an atomic diagram is
formal charge
valence electrons - valence electrons owned by atom (non binding + 1/2 bonding
what is known about the relation to formal charge and structure of atom
the correct structure will have lowest formal charge
what is true about sum of formal charges for molecule
sum of formal charges is equal to overall charge of molecule
what do two atoms with same electronegativity so
share electron perfectly 0-.4
what happens if there is medium difference between atoms
polar covalent bond .4-2
what happens to bond if there’s a big electromagnetivity difference
polar covalent 2
In vspr what counts towards shape of atom
every single electron connection, even lone pairs count as 1
do lone pairs affect electron angles
they do because they’re slightly bigger
molecular geometry
bonds that are actually formed not including loan pair
