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WorksheetsChem Midterm Review
Total questions: 39
Worksheet time: 2hrs 32mins
Name
Class
Date
1.
An electron is
a)
positively charged
b)
neutral
c)
negatively charged
2.
Burning a piece of paper
a)
Chemical Change
b)
Physical Change
3.
A _________ is a substance made of two or more DIFFERENT elements chemically combined.
a)
mixture
b)
compound
c)
substance
4.
A bar of gold is made of only one ______
a)
Plasma
b)
Mixture
c)
Element
d)
Compound
5.
Anything that takes up space and has mass is known as _______________.
a)
Matter
b)
Molecules
c)
Compounds
d)
Stuff
6.
In the atom diagram shown, E is pointing to
a)
An electron
b)
a proton
c)
a neutron
d)
the nucleus
7.
Which of the following is found in the nucleus of an atom?
a)
electrons
b)
neutrons
c)
The center of an atom, composed of protons and neutrons
d)
molecules
8.
An ionic bond forms when
a)
Valence electrons are shared
b)
a sea of mobile electrons surround the cations
c)
valence electrons are transferred between atoms
d)
none of the above
9.
In chemical compounds, covalent bonds form when
a)
the electronegativity difference between two atoms is very large.
b)
electrons are completely transferred between two atoms.
c)
pairs of electrons are shared between two atoms.
d)
ions are held together by opposite charges.
10.
Why type of bond is forming between the atoms in the diagram?
a)
Ionic
b)
Covalent
11.
What quantities vary between isotopes of an element?
a)
protons, electrons, and atomic mass
b)
protons, electrons, and atomic number
c)
neutrons and electrons
d)
neutrons and atomic mass
12.
What kind of change is a phase change?
a)
Physical - it's still the same substance
b)
chemical - it's made of chemicals
13.
Which of the following will have a larger radius than Zinc?
a)
Gallium
b)
Aluminum
c)
Magnesium
d)
Strontium
14.
Which of the following will have a higher electronegativity than arsenic (As)?
a)
Carbon (C)
b)
Neon (Ne)
c)
Antimony (Sb)
d)
Germanium (Ge)
15.
Which atom has the largest atomic radius?
a)
potassium
b)
rubidium
c)
francium
d)
cesium
16.
The Modern Periodic Table of Elements is arranged by
a)
atomic mass
b)
atomic number
c)
valence electrons
d)
number of isotopes
17.
Two substances physically combined and that appears the same throughout is classified as
a)
A homogeneous mixture
b)
A heterogeneous mixture
c)
An element
d)
A compound
18.
Physical or Chemical Change? Baking a cake.
a)
Chemical Change
b)
Physical Change
19.
What is this element?
1s22s22p63s23p6
4s23d104p6
1s22s22p63s23p6
4s23d104p6
a)
Argon
b)
Krypton
c)
Selenium
d)
Bromide
20.
What atom matches this electron configuration?
[Xe] 6s2 4f14 5d9
[Xe] 6s2 4f14 5d9
a)
Mercury
b)
Gold
c)
Platinum
d)
Thallium
21.
How many d orbitals are there in a given sublevel?
a)
1
b)
3
c)
5
d)
7
22.
If an atom has 4 protons, how many valence electrons will it have?
a)
4
b)
6
c)
2
d)
0
23.
Properties that DO depend on the amount of matter present.
a)
Mass
b)
Hardness
c)
Extensive
d)
Intensive
24.
Which of the following is an extensive property?
a)
Color
b)
Mass
c)
Odor
d)
Luster
25.
Which of the following is an intensive property?
a)
Color
b)
Mass
c)
Volume
d)
Weight
26.
How many Significant Figures in the number below?
4,500
4,500
a)
3
b)
4
c)
2
d)
1
27.
How many Significant Figures in the number below?
0.456
0.456
a)
3
b)
4
c)
2
d)
1
28.
Solve & Round to Correct Sig Figs.
4.5 + 4.32 =
4.5 + 4.32 =
a)
8.8
b)
8.7
c)
8
d)
8.0
29.
Solve & Round to Correct Sig Figs.
4.5 x 2.34 =
4.5 x 2.34 =
a)
11
b)
10.52
c)
10.5
d)
10
30.
How many neutrons does the isotope below have? 89 36Kr
a)
53
b)
36
c)
89
d)
125
31.
24.1% of all the isotopes of a an element have a mass of 75.23 amu, 48.7% have a mass of 74.61 amu, and 27.2% have a mass of 75.20 amu.
What is the average mass of this element?
What is the average mass of this element?
a)
74.92 amu
b)
24.97 amu
c)
75.01 amu
d)
74.51 amu
32.
Name this formula:
KNO3
a)
Potassium Nitrogen Oxide
b)
Potassium Nitride
c)
Potassium Nitrate
d)
Potassium (I) Nitrite
33.
Name the compound NH4OH
a)
ammonium hydroxide
b)
ammonia oxyhydride
c)
mononitrogen tetraoxihydride
d)
hydrogen nitrate
34.
What is the charge on the calcium ion?
a)
1+
b)
2+
c)
2-
d)
1-
35.
Which is a transition metal?
a)
cesium
b)
iron
c)
helium
d)
tellurium
36.
Select the correct formula for sulfur hexachloride
a)
S2Cl6
b)
S6Cl
c)
SCl6
d)
SF6
37.
What kind of bond forms between two nonmetals?
a)
Chemical bond
b)
Ionic bond
c)
Covalent bond
d)
Electron bond
38.
Name the following compound: SnO2
a)
tin(II) oxide
b)
tin(IV)oxide
c)
tin(II)oxygen
d)
tin oxide
39.
Name the following ionic compound: FeCl3
a)
iron chloride
b)
iron (III) chloride
c)
iron chlorate
d)
iron (III) chlorate
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