Chem 100/121
Quiz 3a
Name_______________________
Density, Elements, Atoms, Reading Scales
The table from the back of the book is reproduced on page 2 of this quiz
3
1. What mass of lead (d = 11.34 g/mL) will occupy 10.0 ft ?
3 points
2. List, in decreasing order of abundance, the two most abundant elements on the Earth’s surface.
Ans. ____________, _________,
2 points
4. Write the symbols for the following elements:
4 points
A. Tin__________B. Lead__________C. Silver__________D. Antimony__________
E. Iron__________F. Arsenic________G. Cobalt ________ H. Chromium _________
5. Write the names for the following elements:
4 points
A. Au ____________B. W_____________C. Cs___________D. Br______________
E. Ge_____________F. Ti_____________G. Ba___________H. S_______________
6. Identify the following elements based on their descriptions: (4 pts + 1 pt extra credit)
a. The metal that melts in your hands: _________________
b. The solid diatomic element: ______________
c. The most abundant element in the universe: ___________
d. The liquid diatomic element: ____________
e. (extra credit) The newest element in the periodic table (as of August 2003): _________
Chem 100/121
Quiz 3a
Name_______________________
7. How many oxygen atoms are in Co2(ClO4)3 (1 pts) __________
8. How many total atoms are in each of the following formulas? (2 pts):
a. C2H6O2 ________
b. V3(SO4)2 ________
The following questions are part of your lab experiment grade, not part of the quiz grade:
Give the reading in grams for the following diagram, which represents the positions of weights on a
triple-beam balance. (3 pts each)
0
10
20
30
40
50
0
300
200
100
0
60
1
3
2
Mass = __________________
0
0
0
10
20
30
40
Mass = __________________
60
300
200
100
1
50
2
3