Chemical Bonding Quiz Flashcards
attractive force between atoms or ions that binds them together as a unit
Chemical Bond
Why do atoms form bonds?
to decrease potential energy and increase stability
What is COVALENT bonding
- electrons are SHARED (“co”) between atoms in a molecule/polyatomic ions
What is ionic bonding?
Cations and anions are being held together by electrostatic forces
- electrons are TRANSFERRED
What are the 2 types of Covalent bonds?
Non polar covalent and polar covalent
what is polar covalent?
an UNEQUAL attraction for shared electrons creating partially charged poles
-ASYMMETRICAL ELECTRON DENSITY
What does this mean?
δ-
symbol for partially negative
What does this mean?
δ+
symbol for partially positive
What is non-polar covalent?
electrons are shared EQUALLY
-SYMMETRICAL ELECTRON DENSITY
which bond has no charges on atoms?
non-polar covalent
Which bond has partial charges on atoms
Polar covalent
Which has full charges on resulting ions?
Ionic Bond
Electro negativity in polar covalent bonds
higher electronegative atom = = δ-
lower electronegative atom = δ+
The higher electronegative atom forms an _____
anion
anion =
(gains or loses electrons)
gains electrons
cation =
(loses or gains)
loses
Non-metal + Non-metal
Covalent
Metal + non-metal
ionic
in metals, valence electrons are ________
delocalized - free to roam, not belonging to 1 atom
Sea of electrons
delocalized electrons
