Lewis Dot Flashcards
bond
force that holds group of two or more atoms together and makes atoms function as a unit
ionic bond
attractions between oppositely charged ions
metallic
electrostatic attraction between cations
covalent bond
2 nonmetals bonding by sharing electrons
non polar covalent
equal sharing of electrons
polar covalent
unequal sharing of electrons
- electrons spend more time around the more nonmetallic atom
- charge seperation, dipole movement
covalent (molecular) compounds forms
gases, liquids, or solids (made of molecules)
covalent compounds properties
- low melting and boiling points
- poor electrical conductors
- many soluble in non-polar liquids (not water)
covalent network solids
covalent because combinations of nonmetals, interconnected
covalent network solids properties
- extreme melting and boiling points
- interconnected
- very hard and brittle
- insoluble
‘covalent bonds’
- involve the sharing of a pair of valence electrons by two atoms
- such bonds lead to stable molecules by sharing electrons to create a noble gas
electronegativity
- high electronegativity tend to hold tightly to their electrons, form negative ions & partial negative charge
- low electronegativity tend to have lower attraction, form positive ions & partial positive charge
polar vs non polar
polar
- unequal sharing
- non symmetrical
non polar
- equal sharing
- symmetrical
2 atoms, 0 lone pairs, 1 central
linear, 180 degrees
3 atoms, 0 lone pairs, 1 central
trigonal planar, 120 degrees
