1.A student added an alka seltzer tablet to some water in a bottle and then sealed the bottle. As usual the tablet reacted with the water giving off gas and finally disappearing. Before the student added the tablet to the bottle, she was careful to weigh the bottle, water and tablet. She found their total weight to be 190 g. After the reaction------

a.the bottle and contents weighed less than 190 g because the tablet could not be seen.
b.the bottle and contents weighed more because the gas formed added to the weight.
xc.the bottle and contents weighed the same 190g as before.
d.none above

2.A person was choosing a form of vitamin X. There were two brands of the vitamin. Brand A claimed that it came from natural, herbal sources. Brand B made no claims but it was clear that the vitamin was made in a factory. Vitamin X is a molecule of known chemical composition.

xa.The customer should choose on the basis of price since any known compound has the same composition no matter the source.
b.The customer should always choose the natural product since natural products are always better than manufactured products.
c.Compounds from natural sources have different composition from those made in a factory.
d.Composition of compounds varies depending on the source.

3.Given the atomic mass of Mg = 24amu, of S=32amu and of O=16amu, the mass of MgSO4 is

xa. 120 amu
b. 72 amu
c. 6 amu.
d. none above

4.From the list below choose the compound(s).

a. As
xb. CO
c. Co
d. P4
e. b & d


5. From the list below choose the matter form(s) most likely to be (a)mixture(s) .

xa. gasoline
b. NaCl
c. Mg
d. KBr

6.The electron configuration 1s22s22p63s2 is he electron configuration for

a. C
xb. Mg
c. Ca
d. O

7.The electron configuration 1s22s22p53s1

a. is an excited state for Ne
b. is the configuration for Na
c. will eventually become 1s22s22p6 with the release of energy.
xd. a & c above

8.There are ____ neutrons, ____protons and _____electrons in S. (Atomic mass 32)

xa. 16, 16, 16
b. 32, 32, 16
c. 32, 16, 16
d. 16, 16, 32.

9.In experiment 1, Observation, most students observed that a brown colored product resulted from the addition of Al to copper sulfate and sodium chloride in water solution. Choose the true statement(s).

a.The Al must have disappeared- Al atoms were lost.
b.A new substance formed that had to be composed of one or more of the elements that were present at the beginning of the reaction.
c.The heat indicated that the reactants had potential energy that was released when the reaction took place.
d. all above
xe. b & c only


10.Conversion of 2.5 meters to centimeters would require the following algebraic set-up.
100 cm=1M

xa. 2.5 M x 100cm
1 M

b. 2.5 x 100
1

c. 2.5 M x 100M
1cm

d. 2.5M x 1cm
100M

11.The following data were recorded by a student doing experiment 2.

Mass of object = 55 g
volume of water in graduated cylinder = 65 mL
volume of water with the immersed object = 76 mL
Density of the object would be: 11g/ml question eliminated.

a. 0.2 mL/g
b. 0.85g/mL
c. 0.72g/mL
d. 0.2g/mL

12.Element 95 is in the sector of the periodic table known as

xa. inner transition metals
b. alkali metals
c. alkaline earth metals
d. noble gases

13.Generally speaking, we can say that _______ are on the right side of the periodic chart.

a. metals
b. nonmetals
c. noble gases
xd. b & c

14.Your text calls the Shroud of Turin a fraud based on C-14 results. Newer data from Dr Alan Adler at W. CT St. University (Danbury CT) challenges the C-14 data based on sampling problems.

a.This shows the tentative nature of scientific data.
b.This shows the testable nature of scientific data.
c. This shows the final nature of scientific data
xd. a & b above

15. Theories belong to the

a. dogmatic nature of science
b. authoritarian nature of science
xc. explanatory nature of science
d. none above

16.The following reaction takes place with the following exact mass relations:

S + O = SO
3.2 g 1.6 g 4.8 g

If one adds 3.2 g of S to get an initial starting amount of 6.4 g, then

a. 9.6 g of SO will result
b. 4.8 g of SO will result
xc. 4.8 g of SO will result with 3.2 g S left over.
d. The answer is not listed above.

17. Energy that is stored is called

a. formal energy
xb. potential energy
c. kinetic energy
d. cultic energy

18.The state of matter that has its molecules in stationary positions that give rise to crystals is

a. gas
b. liquid
xc. solid
d. none above

19. In a given group or family

xa.the valence electrons have similar electron configurations regarding s & p orbitals
b.the elements react differently
c. valence electrons have dissimilar configurations regarding s & p orbitals.
d.b&c above

20.The proper energy level hierarchy is (for < you can substitute "less than")

a. 1s<2s<3s<2p<3p
xb. 1s<2s<2p<3s<3p
c. 3s<3p<2s<2p<2s
d. 1s<1p<2s<2p<3s<3p

21.In a period on the periodic table, the elements

a. have similar chemical properties
b. have similar valence electron configurations
xc. have different chemical properties
d. a & b above

22. The particle(s) in the nucleus of an atom is(are)

a. electron
b. proton
c. neutron
d. all above
xe. b & c only

23. An atom is

a. a particle that has mainly empty space
b. very much like a solid ball
c. a particle with a very small massive nucleus
xd. a & c above


24.The life for an isotope is 20 sec. If one has 2000 g of this isotope right now, in 1 minute (60 sec) there would only be _____g left undecayed.

a. 2000g
b. 1000g
c. 500g
xd. 250 g
e. 125g

25.The conversion of N-14 to C-14 through bombardment by a neutron is known as

a.critical mass
b.cosmic conversion
xc. transmutation
d.elimination

26.Isotopes of a given element

xa. have identical atomic numbers
b. have identical atomic masses
c. have identical numbers of neutrons
d. b & c above

27. Beta radiation

xa. consists of an electron emitted from the nucleus
b. consists of a He nucleus emitted from a nucleus
c. consists of a high energy photon emitted from a nucleus
d. consists of a proton emitted from a nucleus

28. For 7Li, the number of

a. protons is 7
b. neutrons is 7
c. electrons is 3
d. neutrons is 4
xe. c & d above


29. One megaton in nuclear bomb terminology means

xa. one million tons of TNT equivalent explosive
b. one thousand tons of TNT equivalent explosive
c. one billion tons of TNT equivalent explosive
d. one trillion tons of TNT equivalent explosive

30.The most devastating effects of the Chernobyl disaster in the previous Soviet Union was
a. a nuclear explosion that killed millions
xb. nuclear fallout resulting from a fire in one of the three reactors
c. loss of electrical power
d. the destruction of a nuclear submarine