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