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					Quiz 1A                                         Name _________________________
10 points                                       Maleckar/960/Fall 2011
Avogadro’s number: 6.022 x 1023

1. How many atoms are in one teaspoon (4.9289 ml) of water? The density of water is
approximately 1.00 g/ml. MW of water is 18 g/mole




2. Which atom has the smallest number of neutrons?
     14                  14            16            19            20
A.        C         B.        N   C.        O   D.        F   E.        Ne


3. Group 2A is commonly referred to as The _________________________________.


4. When Sr ionizes, does it form a cation or an anion? ________________________

     What is its most stable charge when it ionizes? ________


5. Who proposed that atoms have nuclei? _______________________________


6. Which are isotopes? An atom that has an atomic number of 20 and a mass number of
42 is an isotope of an atom that has

A.   an atomic number of 21 and a mass number of 42.
B.   an atomic number of 20 and a mass number of 40.
C.   22 neutrons and 20 protons.
D.   22 protons and 20 neutrons.


7. Give the answer with the correct number of significant digits.

              (23.9 + 95.84)(4.86) = ___________________________




8. Is CO2 an ionic or covalent compound? ___________________
Quiz 1B                                        Name _________________________
10 points                                      Maleckar/960/Fall 2011
Avogadro’s number: 6.022 x 1023


1. Sulfur should have properties most similar to ______.

A. P               B. Na         C. Cl         D. Se         E. C



     119
2.         Sn2+ contains _______ protons, ________ neutrons, and ___________ electrons.


3. Is CCl4 a covalent or ionic compound? _________________


4. 18 K gold is 75% gold, by mass. If you have 1.00 ounce of 18 K gold, how many
gold atoms do you have? 1 ounce = 28.3495g




5. Pd is a member of the _____.

A.   Alkali Metals
B.   Halogens
C.   Alkaline Earth Metals
D.   Transition Metals
E.   Lanthanides
F.   none of these


6. You spill pop on your desk and it evaporates overnight. Is this a physical or chemical
process?




7. Who is called the father of the periodic table?
Quiz 1C                                     Name _________________________
10 points                                   Maleckar/960/Fall 2011

Avogardo’s number: 6.022 x 1023


1. John Dalton postulated that atoms contain a positively-charged nucleus surrounded by
a negatively-charged electron cloud. True or False?? __________________


2. Which of the following represent isotopes?
        A. 32 X
           15         B. 32 X
                         16
                                        31
                                     C. 15 X           34
                                                    D. 17 X

A. A and B                         B. A and C
C. A and D                         D. C and D

3. The Alkaline Earth Metals contains ______.

A. Rb         B. I           C. Ru          D. Sm          E. Sr

4. Does S form cations or anions when it ionizes? _____________

What charge does S have when it ionizes? _______________

5. Give the answer with the correct number of significant digits.

        (47.6 + 5.392) / (8.26 + 38.1) = _____________________


6. How many grams does 1 trillion (1 x 1012) atoms of silver (Ag) weigh?




7. Is SO2 ionic or covalent? ____________________

8. A compound containing only sulfur and oxygen is decomposed and found to contain
1.210g of S and 1.811g of O. Another sample of the same compound was found to
contain 1.783g of S. How many grams of O would you expect it to contain?
Quiz 1D                                     Name _________________________
10 points                                   Maleckar/960/Fall 2011

Avogardo’s number: 6.022 x 1023

1. How many protons (p) and neutrons (n) are in an atom of 90 Sr ?
                                                           38

A.   38 p,   52 n
B.   38 p,   90 n
C.   52 p,   38 n
D.   90 p,   38 n

2. When Br ionizes, does it tend to form a cation or an anion? ____________
  What charge does it tend to have?_________

3. You boil a pot of water. Is this a chemical or physical process? _________________

4. Is ZnO a covalent or ionic complex? ___________________

5. What mass (in kg) does 5.84 moles of titanium (Ti) have? 1000g = 1kg

A.   0.352 kg
B.   0.122 kg
C.   0.820 kg
D.   0.280 kg
E.   0.632 kg

6. Who stated that compounds are always made up of the same atoms? _____________

7. Iodine belongs to the __________ group of the periodic table.

A.   alkali metal
B.   alkaline earth metal
C.   halogen
D.   noble gas

8. Silver has an atomic mass of 107.868 g/mole. The Ag-109 isotope (108.905 g/mole)
is 48.16%. What is the molecular weight of the other isotope?

A.   106.905 g/mole
B.   106.908 g/mole
C.   106.903 g/mole
D.   106.911 g/mole
Quiz 1E                                     Name _________________________
10 points                                   Maleckar/960/Fall 2011

Avogardo’s number: 6.022 x 1023


1. Which of the following species has 17 protons, 18 neutrons, and 18 electrons?
                      -                              +
A. Cl         B. Cl          C. Ar          D. Ar          E. Kr

2. Which of the following elements is a metalloid?

A. Zn         B. Ge          C. C           D. Sn          E. S

3. Does Ca tend to form a cation or an anion when it ionizes? ____________
What charge does it tend to have? _________

4. Who proposed that the atom was made up of negative electrons embedded throughout
a positive medium?


5. Which pair of elements do you expect to be the most similar?

A. nitrogen and oxygen               D. germanium and arsenic
B. titanium and gallium              E. lithium and sodium
C. argon and bromine

6. You place an ice cube on the table and it melts. Physical or chemical change?


7. Give the answer with the correct number of significant digits.

        (47.3 + 4.79)(5.63 + 17.9) = _________________

8. A pure copper sphere has a radius of 0.935 in. How many copper atoms does it
contain? (V = 4/3r3; d = 8.96 g/cm3; 2.54cm = 1 in)

				
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