test [80 points] Honors Chemistry date: _____________
Ch. 3 & 11 atom, molecule, & atomic structure
1. Determine the average atomic mass of carbon based on the following hypothetical data: [show your work, including any equation / formula used to solve the problem; 10 points]
test [80 points] Honors Chemistry date: _____________
Ch. 3 & 11 atom, molecule, & atomic structure
1. Determine the average atomic mass of carbon based on the following hypothetical data: [show your work, including any equation / formula used to solve the problem; 10 points]
isotope
Abundance
12C
85 %
13C
10 %
14C
5 %
2. fill-in the below table. [22 points]
symbol |
Atomic mass |
# protons |
# neutrons |
# electrons |
Charge |
141La 3+ |
|
|
|
|
|
|
20 |
|
12 |
|
- 2 |
|
90 |
38 |
|
36 |
|
3. Write the chemical formula of an ionic compound containing: [8 points]
a. aluminum and sulfur
b. fluorine and barium
c. potassium and nitrogen
d. strontium and chlorine
4. Identify the atoms (by their chemical name, not symbol) and the number of such atoms in the following compounds. [10 points]
a. Ca3(PO4)2 contains
b. CH3(CH2)2OH contains
c. H 2N – CH(C6H5OH) – COOH contains
5. What is the electron configuration and orbital diagram of: [20 points]
a. sulfur
b. arsenic
6. Which atom, chlorine or iodine, has a larger 1 st ionization energy ? Rationalize your answer. [10 points]