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Test Description: Review over some of the major concepts for SC 7th grade science
Instructions: Answer all questions to get your test result.
1) The ending materials of a chemical reaction
A
product
B
acids
C
metals
D
reactant
2) The beginning materials of a chemical reaction
A
reactant
B
metals
C
nonmetals
D
product
3) The products in the equation H2SO4 + Zn = ZnSO4 + H2
A
H2SO4 + Zn + ZnSO4 + h2
B
H2SO4 only
C
H2SO4 + Zn
D
ZnSO4 + H2
4) The number written in front of a formula to indicate the number of molecules in the reaction; multiply this by the subscript when counting atoms
A
products
B
reactants
C
coefficient
D
subscript
5) In an ordinary chemical reaction, matter is not created or destroyed. What law is this
A
Law of Conservation of Energy
B
Law of Conservation of Mass
C
Law of Gravitational Attraction
D
Law of Equations
6) If a chemical reaction starts with 50 grams of one substance and 35 grams of another substance, how many grams of product will be produced?
A
50
B
35
C
15
D
85
7) If 5 atoms of oxygen are part of the products, how many atoms of oxygen were in the reactants?
A
10
B
no way to know
C
15
D
5
8) Which element is found in group 18, period 3?
A
Krypton
B
Neon
C
Argon
D
Helium
9) Elements in the same______ have similar physical and chemical properties
A
Period
B
Transition Elements
C
Metalloids
D
Group
10) Which group of metals is the MOST reactive?
A
Group 1
B
Group 17
C
Group 2
D
Group 18
11) Which group of nonmetals is the MOST reactive?
A
Group 18
B
Group 1
C
Group 17
D
Group 2
12) Which group of nonmetals is the LEAST reactive?
A
Group 1
B
Group 18
C
Group 17
D
Group 2
13) Who is the father of the modern periodic table?
A
Einstein
B
Bohr
C
Moseley
D
Mendeleev
14) Using your periodic table, what is the rounded atomic mass of oxygen?
A
24
B
16
C
8
D
15
15) Which of these is a property of acids?
A
turns litmus red
B
pH more than 7
C
turns phenolphthalein magenta
D
bitter taste
16) Which of these is a property of bases?
A
turns litmus blue
B
does not change color in phenolphthalein
C
sour taste
D
reacts with metals to release hydrogen
17) What color is litmus in an acid?
A
magenta
B
blue
C
orange
D
red
18) Can be stretched or drawn into a wire
A
none of these
B
ductile
C
luster
D
malleable
19) Of the pH values listed, which is a strong acid?
A
14
B
5
C
7
D
1
20) Of the listed pH values, which is neutral?
A
7
B
9
C
14
D
1
*select an answer for all questions
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