chem Flashcards
chemical bonding
what causes atoms to stick together
bond
force that holds groups of two or more atoms together and makes them function as a unit
ionic bonding
between ionic bonding that contain a metal (loses electrons) and a nonmetal (gains electrons)
covalent bonding
between two non-metals (electrons are shared by nuclei)
electronegativity
relative ability of an atom in a molecule to attract shared electrons to itself
the higher the atom’s electronegativity value
the closer the shared electrons tend to be to that atom when it forms a bond
increases
across a period
decreases
down a group
the smaller an atom
the more strength
0-0.5
covalent
0.5-1.5
polar covalent
> 1.5
covalent
covalent:
equally shared
polar covalent:
not very equally shared
ionic:
not sharing