Chapter 1
Chapter 2
Chapter 3
Chapter 4
Chapter 5
100
Does a large sample and a small sample of a compound have the same number of each type of atom?
Example:
Does one ounce of H2O and two ounces of H2O have the same number of hydrogen and oxygen atoms?
No, because a compound has atoms in identical proportions, not atoms in identical numbers.
100
Define what a noble gas and provide an example.
A noble gas is an element in group 18 of the periodic table that have eight valence electrons.
100
What is the wavelength in meters of a radio station operating at a frequency of 99.6 MHz?
A. 3.01 x 106 meters
B. 3.32 x 10-7 meters
C. 0.332 meters
C. 0.332 meters
100
Describe a metallic bond.
A metallic bond is a sea of pooled electrons or the electrons are delocalized.
100
Is CCl4 nonpolar or polar?
nonpolar
200
Which of the following is true about a molecule?
A. it must contain at least two types of atoms
B. it can be made of two or more elements or a compound
C. it cannot form a solid
D. it cannot be broken down into the atoms it's made of
B. it can be made of two or more elements or a compound
200
Which of the following is NOT a type of radiation?
A. Delta
B. Gamma
C. Alpha
A. Delta
200
What is the energy in Joules of the 514.5nm photons emitted by an argon-ion laser?
3.86 x 10-19 Joules
200
True or False:
Ionic bond strength depends primarily on the radii and charges of the ions.
True
200
What is the hybridization for Cl2O?
Sp3
300
Define what an intensive property is and what an extensive is property and give an example of each.
Intensive properties are independent from the amount of a substance while extensive properties are dependent on the amount.
Examples:
intensive - temperature, density
extensive: mass, volume
300
Calculate the number of molecules in 5.26 mol of ammonia (NH3).
3.17 x 1024
300
What is Hund's rule?
When filling up orbitals, all orbitals must receive one electron before the electrons begin to pair up and the paired electrons should have opposite spins.
300
How many valence electrons are in the lewis structure of (PO4)-3?
32
300
What is the molecular geometry for SO2?
Bent
400
Which statement about the picture below?
A. The particles in picture one are highly ordered.
B. The particles in picture two are highly compressible.
C. The particles in picture one can vibrate depending on their temperature.
C. The particles in picture one can vibrate depending on their temperature.
400
What is the formula unit mass of calcium chloride (CaCl2)?
110.984 u
400
What is the first orbital that is filled up in an orbital diagram?
An s orbital.
400
How many resonance structures can be drawn for the nitrate ion (NO3)-?
3
400
What is the hybridization for XeF2?
none!
500
The distance between two hydrogen atoms in a water molecule is about 1.355 x 10-10 meters. What is this distance in picometer?
135.5pm
500
Identify the element based on the following values for its three isotopes: 38.9637u (93.08%); 39.9640 u (0.012%); 40.9618 u (6.91%).
Potassium (K)
500
Radio waves have very high wave lengths and UV waves have very low wave lengths. What is true about radio and UV wave lengths?
A. The frequency of radio waves is much lower than the frequency of UV rays.
B. The frequency of UV rays is lower than the frequency of of radio waves.
C. They have the same frequencies.
A. The frequency of radio waves is much lower than the frequency of UV rays.
500
What is the chemical name for PH3?
phosphorous trihydride
500
Draw the lewis structure for XeF4
See problem 18 on lewis structure packet