Ionic Bonding
Covalent Bonding
Metallic Bonding and some other stuff
Intermolecular Forces
Grab Bag
100
What is an ion?
An element or group of elements that carries a charge.
100
How is a covalent bond formed?
Two or more nonmetals share valence electrons to complete an octet.
100
What do we mean by an octet rule?
atoms want 8 valence electrons.
100
When we talk about intermolecular forces of water are we talking about forces between the oxygen and the hydrogen atom or from one molecule of water to another.
Forces from one molecule of water to another (interMOLECULAR) -the force from an oxygen to a hydrogen is a covalent bond.
100
How many teeth do adult humans have (assuming none have been removed)?
32
200
Draw the correct electron dot structure of a Calcium ion
Ca2+
200
How many electrons are involved in a covalent double bond?
4
200
How is metallic bonding different from other types of bonding?
Metallic bonding has a sea of electrons that hold together the metal cations.
200
Give two properties of a substance affected by intermolecular forces.
Volatility/melting/boiling point
200
Write the formula for dihydrogen trioxide
H2O3
300
What would be the correct formula for Magnesium Floride?
MgF2
300
How does the structure of covalent molecules differ to the structure of substances formed by other types of bonding.
Covalent bonds form discreet molecules (such a molecule of water)- ionic and metallic bonds for larger 'extended structures'
300
Give a trait of metals and explain how it is influenced by the sea of electrons
-metals are ductile and malleable because the free flowing electrons allow the atoms to slide past each other rather than breaking apart when exposed to a force.
-metals conduct electricity because moving electrons can carry an electric charge.
300
Explain why hydrogen bonding is the strongest of the intermolecular forces we studied?
Hydrogen atoms have no shielding electrons, so when paired with an electronegative atom the proton is exposed creating a strong positive charge.
300
Charles Darwin and Crocodile hunter Steve Erwin onced owned the same animal- what was the species of that animal.
Galapagos tortoise named Harriet- collected by Charles Darwin, eventually ended up in Australia in Steve Erwin's zoo. She died in 2006 at the age of 175-176.
400
Melting Point. Conductivity. Conductivity (Aq)
A. 789 C. N. Y
B. 588 C Y N
C 0 C N N
Which substance or substances are most likely ionic?
Substance A is ionic. B is metallic. C is covalent.
400
What do we mean when we say an atom is highly electronegative? When electronegative atoms bond to atoms that are less electronegative, what type of bonds do they tend to form?
An electronegative atom will draw electrons to itself in a bond. When bonded to a less electronegative atom is will form a polar covalent or an ionic bond.
400
What is the name of the following three substances:
-Al2O3
-Mg
-C2O4
Aluminum oxide
Magnesium metal
dicarbon tetroxide
400
Which of these two substances would you expect to be more volatile and why?
H2O
CO2
CO2 would be more volatile because water possesses hydrogen bonds-hydrogen bonding holds molecules together and therefore they are unable to easily go into the gas phase.
400
Write the following two formulas:
Aluminum sulfide
Aluminum sulfate
AlS3
Al2(SO4)3
500
Draw a correct electron dot structure for Aluminum Chloride
500
Draw the correct electron dot structure for dicarbon tetrahydride.
500
Why are naming rules different for metals and ionic structures as compared to covalent molecules?
Due to electrostatic attractions forming an overall neutral substance- ions always bond in the same proportian (example sodium and chlorine will always bond 1:1) Due to the sharing of electrons and ability to form multiple bonds, nonmetals can bond in many different proportions (example: CO and CO2) so prefixes are needed to specify.
500
Which of the following would you expect to have the highest melting point?
CO2
MgSO4
H2SO4
H2
MgSO4 Is an ionic compound and therefore has much stronger forces of attraction
500
What is Boise's sister city? (Hint: there is a mural in Boise representing a painting by the same name)
Guernica, Spain