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WorksheetsScience BM 2 Review
Total questions: 35
Worksheet time: 20mins
Name
Class
Date
1.
Which variable goes on the y-axis?
a)
Independent Variable (IV)
b)
Dependent Variable (DV)
c)
Control Variable
d)
Constants
2.
Which variable goes on the x-axis?
a)
Independent Variable (IV)
b)
Dependent Variable (DV)
c)
Control Variable
d)
Constants
3.
Two or more chemically combined substances form
a)
a mixture
b)
a compound
c)
an element
d)
an acid
4.
Two or more physically combined substances form
a)
a mixture
b)
a compound
c)
an element
d)
an acid
5.
MgCl2 is an example of
a)
an element
b)
a mixture
c)
a compound
d)
an abbreviation
6.
The type of bond that forms when electrons are transferred from a metal to a nonmetal element is
a)
a covalent bond
b)
an ionic bond
c)
a valence bond
d)
a chemical bond
7.
Electrons that are on the outer shell and participate in bonding are called...
a)
outer electrons
b)
inner electrons
c)
valence electrons
d)
ionic electrons
8.
What is an example of a chemical property?
a)
Oxygen is a gas
b)
Sulfur is a yellow solid
c)
Vinegar will react with baking soda
d)
The glass vase shattered
9.
How is the modern atomic model different from all the other atomic models?
a)
it has no protons
b)
it has a nucleus
c)
it has energy levels (shells)
d)
it has an electron cloud
10.
How is the Bohr model of the atom different from all the other atomic models?
a)
it has no nucleus
b)
it has energy levels (shells)
c)
it has an electron cloud
d)
it is very large
11.
Which of the following is an example of plasma?
a)
a cloud
b)
milk
c)
rocks
d)
lightning
12.
Anything that has mass and takes up space is known as...
a)
volume
b)
mass
c)
matter
d)
elements
13.
Particle theory states that particles are ...
a)
in constant motion
b)
stationary
c)
floating around
d)
different
14.
The number of protons in an element is....
a)
the mass number
b)
the atomic mass
c)
the atomic number
d)
the group number
15.
Elements that have the same chemical properties are in the same...
a)
period
b)
group
c)
section
d)
category
16.
The number of valence electrons is determined by the element's....
a)
group number
b)
period number
c)
chemical symbol
d)
atomic mass
17.
Where are nonmetals located on the periodic table?
a)
the left side
b)
the bottom
c)
the right side
d)
the top
18.
The metalloids are in the shape of a __________________ on the periodic table
a)
staircase
b)
diamond
c)
circle
d)
square
19.
What is special about the noble gases?
a)
They all have 1 valence electron
b)
They have a full shell and don't react
c)
They are all solids
d)
They are all metals
20.
A control variable is used for ..
a)
accuracy
b)
variety
c)
comparison
d)
fun
21.
Which step of the scientific method deals with making an educated guess?
a)
problem
b)
hypothesis
c)
analysis
d)
conclusion
22.
In the chemical formula H2O, what is the 2?
a)
a coefficient
b)
a multiplier
c)
a subscript
d)
a constant
23.
Which of the following are properties of metals?
a)
luster, ductile, good conductors
b)
dull, poor conductors, ductile
c)
luster, poor conductors, gases
d)
gases, ductile, poor conductors
24.
An element is dull, a gas, and is a poor conductor. How would the element be classified?
a)
a metal
b)
a metalloid
c)
a nonmetal
d)
a solid
25.
What is the left part of a chemical equation called...
H2 + O --> H2O
H2 + O --> H2O
a)
Reactants
b)
Products
c)
Yields
d)
Chemical Equation
26.
Balance this equation...
HgO --> 2Hg + O2
HgO --> 2Hg + O2
a)
It is balanced
b)
2HgO --> Hg + O2
c)
2HgO --> 2Hg + O2
27.
This is used to represent the number of each atom being represented.
a)
A Exponent
b)
The Coefficient
c)
A Molecule
d)
The Subscript
28.
Law of conservation of mass states that
a)
matter is created
b)
matter is destroyed
c)
matter is neither created nor destroyed
d)
matter does not change
29.
A covalent bond occurs between...
a)
nonmetals only
b)
a gas and a solid
c)
a metal and a nonmetal
d)
metals only
30.
A polar covalent bond means....
a)
electrons are transferred
b)
there is unequal sharing of electrons
c)
there is equal sharing of electrons
d)
a chemical reaction occurred
31.
What is the formula for density?
a)
D = m/s
b)
D = m/t
c)
D = m/v
d)
D = v/m
32.
What is the atomic mass of Gold?
a)
79
b)
196.9665
c)
117
d)
275
33.
What is the atomic number for Iodine?
a)
53
b)
126
c)
73
d)
179
34.
How many protons does an Oxygen atom have?
a)
8
b)
16
c)
24
d)
7.999
35.
When an atom loses a valence electron, it becomes...
a)
a negative ion
b)
a positive ion
c)
a neutral ion
d)
a chemical bond
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