Classifying Bonds
What type of bond is this? H2O
Covalent
What type(s) of elements makes a bond covalent?
Non-metal only
What type(s) of elements make a bond Ionic?
Metal and non-metal
What type(s) of elements makes a bond metallic?
Only metal
Is H-H polar or nonpolar?
nonpolar
What is the geometry for CH4
Tetrahedral
What type of bond is this: Li2O?
Ionic
Do covalent bonds conduct electricity? If so, how?
No they do not conduct electricity
Do ionic bonds conduct electricity? If so, when?
Yes, when dissolved
Do metallic bonds conduct electricity? If so, when?
Yes, in all forms
This force of an atom determines the polarity of a bond
Electronegativity
What is the molecular geometry for CO2
Linear
What type of bond is this: PCl2?
Covalent
What happens to electrons in a covalent bond?
They are tightly shared
What happens to electrons in an ionic bond?
They transfer electrons
What happens to electrons in a metallic bond?
They are loosely shared
Is water polar or nonpolar?
Polar
What part of an atom causes bonds to be pushed into a bent or pyramidal shape?
Lone pairs
What type of bond is this: K3N?
Ionic
What rule do we use to determine the amount of covalent bonds an atom will make?
the octet rule
What do we call the shapes that Ionic bonds make (such as NaCl)
crystals
What does it mean when we call metals "ductile"
It can be stretched into wire.
What makes a molecule polar or nonpolar?
When different atoms in a molecule unequally share electrons.
Name five molecular geometries.
Molecular geometries: Linear, Bent, Trigonal Planar, Pyramidal, Tetrahedral, Trigonal Bipyramidal.
What type of bond is this: Cu+Zn?
Metallic (brass)
What are some characteristics of covalent bonds? (at least 2)
Can't conduct electricity, has low melting and boiling points, malleable, dissolves poorly in water
What are some characteristics of ionic bonds? (at least 2)
Conducts electricity when dissolved, high melting and boiling points, breaks easily
What are some characteristics of metallic bonds? (at least 2)
Conducts electricity, high melting and boiling points, malleable, luster
Is NH3 Polar or Nonpolar?
Polar
Draw the Lewis Dot Structures for NF3 and SF2. Describe the molecular geometries for the central atom of each.
NF3 will be pyramidal and SF2 will be bent.