Q# 3 Flashcards
Lattice energy
how much to separate 1 mol of ionic solid to ionic gas
Lewis dot structure shows…
electron configuration for covalent bonds
multiple bonding
1 pair of shared e- = single bond
- 2 pair = double
- 3 pair = triple
Bond distance…
decreases the more pairs that are shared
non-polar covalent bond
e- shared equally
polar covalent bond
one atom exerts greater attraction
electronegativity
how an atom attracts e- to itself
Dipole moment
occurs in polar molecules where center have positive and negative charge (sigma + and -)
in diploe molecule the arrow points…
Towards the negative end
A dipole is …
when charges are separated by distance
Interactions with metals and non-metals yield…
ionic compounds
Ionic compound properties
- strong electrolytes
- high melting point
- Same as ionic substances
compounds exist as molecules when…
When covalent bonding is dominant
properties present w/ covalent bonding
- low melting & boiling point
- non-electrolye properties
Lewis Dot structure Guidelines
- sum of valence e-
- write symbol of atom , and which are attracted to which (central atom first)
- complete octets
- extra atoms go on central atom
- if not enough, try multiple bonds
