Matter Question Preview (ID: 33005)
Review Over Some Of The Major Concepts For SC 7th Grade Science.
TEACHERS: click here for quick copy question ID numbers.
The ending materials of a chemical reaction
a) reactant
b) product
c) metals
d) acids
The beginning materials of a chemical reaction
a) reactant
b) product
c) metals
d) nonmetals
The products in the equation H2SO4 + Zn = ZnSO4 + H2
a) H2SO4 + Zn
b) ZnSO4 + H2
c) H2SO4 only
d) H2SO4 + Zn + ZnSO4 + h2
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) reactants
b) products
c) coefficient
d) subscript
In an ordinary chemical reaction, matter is not created or destroyed. What law is this
a) Law of Conservation of Energy
b) Law of Gravitational Attraction
c) Law of Equations
d) Law of Conservation of Mass
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
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
Which element is found in group 18, period 3?
a) Helium
b) Neon
c) Argon
d) Krypton
Elements in the same______ have similar physical and chemical properties
a) Period
b) Group
c) Transition Elements
d) Metalloids
Which group of metals is the MOST reactive?
a) Group 1
b) Group 2
c) Group 17
d) Group 18
Which group of nonmetals is the MOST reactive?
a) Group 1
b) Group 2
c) Group 17
d) Group 18
Which group of nonmetals is the LEAST reactive?
a) Group 1
b) Group 2
c) Group 17
d) Group 18
Who is the father of the modern periodic table?
a) Moseley
b) Einstein
c) Bohr
d) Mendeleev
Using your periodic table, what is the rounded atomic mass of oxygen?
a) 8
b) 15
c) 16
d) 24
Which of these is a property of acids?
a) pH more than 7
b) bitter taste
c) turns litmus red
d) turns phenolphthalein magenta
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
What color is litmus in an acid?
a) red
b) orange
c) magenta
d) blue
Can be stretched or drawn into a wire
a) malleable
b) ductile
c) luster
d) none of these
Of the pH values listed, which is a strong acid?
a) 1
b) 5
c) 7
d) 14
Of the listed pH values, which is neutral?
a) 1
b) 7
c) 9
d) 14
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