SLO Review Practice Problems
1.) The correct definition of chemistry is
a. The study of matter and how it interacts with other matter
b. Any substance that has a definite composition.
c. The proportional relationships between two or more substances during a chemical reaction.
d. A substance that has the potential to reduce another substance.
2.) All chemicals are man-made and hazardous.
a. True
b. False
3.) What state of matter has a fixed volume and an indefinite shape?
a. Solid
b. Liquid
c. Gas
d. None of the above
4.) Identify all the products from the equation below.
H2SO4(aq) + 2NaOH (aq) 2Na (aq) + SO4 + 2H2O
a. Na
b. H2SO4 and NaOH
c. H2O and Na
d. Na, SO4, and H2O
5.) Everything in the universe is made up of matter.
a. True
b. False
6.) When measuring the volume of a liquid, you would use a
a. Graduated Cylinder
b. Ruler
c. Scale
d. Thermometer
7.) Which of the following is not a unit for measuring volume
a. Cm3
b. Liter
c. Kiloliter
d. Gram
8.) The formula for finding density is
a. Volume/Mass
b. Mass/Volume
c. Mass x Volume
d. None of the above
9.) Salt water is an example of a(n)
a. Element
b. Compound
c. Heterogeneous Mixture
d. Homogeneous Mixture
10.) How many significant figures are in the measurement 256,001.00?
a. 4
b. 6
c. 2
d. 8
11.) Solve the following problem with the correct amount of significant figures and units.
2.22 m x 1.23 m x 3.21 m = ?
a. 8.765 m
b. 8.76 m2
c. 8.8 m3
d. 8.77 m3
12.) Convert 35 mg to dg.
a. 35 dg
b. 350 mg
c. 0.35 dg
d. 0.035 dg
13.) Convert 100cm to m.
a. 1 m
b. .1m
c. 200m
d. 10m
14.) Convert .02001 into scientific notation.
a. 2.001 x 103
b. 2.01 x 10-2
c. 2.001 x 10-2
d. 200.1 x 104
15.) In the reaction between Hydrogen (H) and Oxygen (O) to form Water (H2O), the mass of hydrogen that reacts is 11 grams. The mass of the water formed is equal to 100 grams. What is the mass of the oxygen?
a. 11 grams
b. 100 grams
c. 89 grams
d. 111 grams
16.) The nucleus of an atom is composed of what particle(s)?
a. Protons and Electrons
b. Neutrons and Electrons
c. Protons
d. Neutrons and Protons
17.) The overall charge of a nucleus of an atom is ______
a. Negative
b. Positive
c. Neutral
d. Varies between atoms
18.) Who is credited for developing the atomic theory?
a. JJ Thompson
b. Ernest Rutherford
c. Albert Einstein
d. John Dalton
19.) Calculate the number of neutrons of the atom whose atomic number is 43 and whose mass number is 96.
a. 53
b. 139
c. 2.23
d. 74.2
20.) Which group of elements loses 1 electron when forming ionic bonds?
a. Halogens
b. Alkaline-Earth Metal
c. Transition Metal
d. Alkali Metal
21.) Which of the following elements does not have 8 valence electrons?
a. Helium
b. Neon
c. Krypton
d. Argon
22.) Which period of elements has exactly 4 energy levels?
a. Period 1
b. Period 3
c. Period 4
d. Period 2
23.) How many valence electrons does Oxygen have?
a. 1
b. 8
c. 6
d. 4
24.) Which element has the highest ionization energy?
a. Oxygen
b. Francium
c. Iron
d. Calcium
25.) What is the atomic number of Mercury (Hg)?
a. 200.59
b. 80
c. 120.59
d. 280.59
26.) What type of bond occurs in the compound NaCl?
a. Ionic
b. Covalent
c. Metallic
d. Physical
27.) A covalent bond occurs between a ______and a ______.
a. Metal, Non-metal
b. Metal, Metal
c. Non-metal, Non-metal
d. Matter, Anti-matter
28.) In a Lewis Dot Diagram, the dots around the chemical symbol represent ______.
a. Valence Electrons
b. Protons
c. Neutrons
d. Atoms
29.) A cation forms from a ______and has a ______charge.
a. Atom, neutral
b. Isotope, positive
c. Metal, positive
d. Non-metal, negative
30.) Covalent bonds occur when two atoms ______.
a. Lose/Gain electrons
b. Share electrons
c. Become friends
d. Walk into chemistry class
31.) Which of the following properties does not describe a salt?
a. Crystal lattice structure
b. High melting point
c. Iodized
d. Ionic Bond
32.) How many atoms are in a mole?
a. 12
b. 1
c. 6.022x1023
d. None of the above
33.) Which of the following is not a diatomic molecule?
a. Hydrogen
b. Helium
c. Oxygen
d. Chlorine
34.) ______states that atoms tend to have a full valence shell or empty valence shell in order to be considered stable.
a. Lewis Dot Diagram
b. Walter White
c. Octet Rule
d. Avogadro’s Number
35.) How many valence electrons does Sodium (Na) have?
a. 1
b. 11
c. 12
d. 3
Short Answer Extended Response
Write your answers to the following questions right on this sheet.
36.) Using dimensional analysis do the following unit conversion:
Circle your final answer. You must show work using dimensional analysis, provide the correct amount of significant figures, and correct units.
3600 m/s è km/hr
37.) Draw the electron diagram for the reaction between Li + O.
Be sure to include all electrons and energy levels for each atom. Label the cation and anion. Provide the balanced equation and circle it.
38.) How many molecules are in 24.4 grams of Oxygen.
Circle your final answer with the correct amount of significant figures and units. Show all of your work.
39.) Draw the electron configuration for Krypton (Kr).