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Chemistry Pre/Post Test Review Flashcards | StudBud
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Chemistry Pre/Post Test Review
Chemistry Pre/Post Test Review
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Review for the Pre/Post test
Flashcards
36 cards
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Practice quiz
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Questions
36
Answers
1
What is the shape of the 3p atomic orbital?
Dumbbell
Two perpendicular dumbbells
Bar
Sphere
2
Which of the following is true about subatomic particles?
The mass of a neutron nearly equals the mass of a proton
Neutrons have no charge and are lightest subatomic particle
Electrons are negatively charged and are heaviest particles
Protons are positive charged & lightest subatomic particles
3
What is another name for the transition metals?
Noble Gases
Group A Elements
Group B Elements
Group C Elements
4
Avogadro's number of representative particles is equal to one____.
Kelvin
Kilogram
Mole
Gram
5
All of the following are physical properties of matter EXCEPT_____.
Color
Melting Point
Mass
Ability to rust
6
What is the mass in grams of 5.90 mole C
8
H
18
?
19.4 g
0.0512 g
673 g
389 g
7
How many molecules are in 2.10 mole C0
2
3.49 x 10-24 molecules
3.79 x 1024 molecules
1.26 x 1024 molecules
2.53 x 1024 molecules
8
What is the electron configuration of the gallium ion?
1s2 2s2 2p6 3s2 3p6 4s2 4p6
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p1
1s2 2s2 2p6 3s2 3p6
1s2 2s2 2p6 3s2 3p6 4s1
9
Which of the following is NOT a characteristic of most ionic compounds?
They have low melting points
They are solids
They are composed of metallic and nonmetallic elements
When melted, they conduct an electric current
10
A golf ball has more mass than a tennis ball because it___?
contains different kinds of matter
has a definite composition
takes up more space
contains more matter
11
Which of these elements does not exist as a diatomic molecule?
Ne
H
F
I
12
The closeness of a measurement to its true value is a measure of its?
Usefulness
Accuracy
Precision
Reproducibility
13
What is the charge of a cation?
The charge depends on the size of the nucleus
A positive charge
A negative charge
No charge
14
What is the formula for phosphoric acid?
HPO2
H2PO3
HPO4
H3PO4
15
An example of an extensive property of matter is _____.
Pressure
Temperature
Mass
Hardness
16
Which of the following is NOT a part of Dalton's atomic theory?
Atoms of the same element are identical
Atoms that combine do so in simple whole-number ratios
Atoms are always in motion
All elements are composed of atoms
17
The calculation of quantities in chemical equations is called _____.
Stoichiometry
Percent Composition
Percent Yield
Dimensional Analysis
18
Which of the following is NOT an example of matter?
Smoke
Heat
Water Vapor
Air
19
Why do atoms share electrons in covalent bonds?
to attain a noble-gas electron configuration
to become more polar
to become ions and attract each other
to increase their atomic numbers
20
What is the density of an object having a mass of 8.0 g and a volume of 25 cm
3
?
200 g/cm3
2.0 g/cm3
0.32 g/cm3
3.1 g/cm3
21
What does the symbol Δ in a chemical reaction mean?
A catalyst is needed
Precipitate
Heat is supplied to the reaction
Yields
22
The expression of 5008 km in scientific notation is____.
5.008 x 10-5 km
5.008 x 104 km
5.008 x 103 km
50.08 x 10-4 km
23
What is the name given to valence electrons that do not participate in bonding in diatomic mol?
Inner pair
Unvalenced pair
Unshared pair
Outer pair
24
The smallest particle of an element that retains the properties of that element is a(n)____.
Electron
Neutron
Proton
Atom
25
The study of chemicals that do not contain carbon is usually called what type of chemistry?
Inorganic
Bio
Analytical
Physical
26
How many valence electrons are in an atom of phosphorus?
2
4
5
3
27
When an equation is used to calculate the amount of product that will form, the value is the__.
Theoretical yield
Actual Yield
Percent Yield
Minimum yield
28
In the Bohr model of the atom, an electron in an orbit has a fixed____.
Color
Energy
Size
Position
29
What type of ions have names ending in -ide?
only metal ions
only anions
only cations
only gaseous ions
30
In a chemical equation H
2
O
2
(aq)--> H
2
O(l) + O
2
(g), the O
2
is a _____.
Reactant
Solid
Catalyst
Product
31
What SI unit is used to measure the number of representative particles in a substance?
Kilogram
Mole
Ampere
Kelvin
32
How are the frequency and wavelength of light related?
They are inversely proportional to each other
Frequency equals wavelength divided by the speed of light
Wavelength is determined by frequency/speed of light
They are directly proportional to each other
33
What element has the electron configuration 1s
2
2s
2
2p
6
3s
2
3p
2
?
Selenium
Silver
Nitrogen
Silicon
34
Which of the following compounds contain the Mn
3+
ion?
Mn2O3
MnO
MnBr2
MnS
35
Which of the following CANNOT be classified as a substance?
Gold
Air
Table Salt
Nitrogen
36
If the temperature changes by 100K, by how much does it change in Celsius?
100o Celsius
37o Celsius
273o Celsius
0o Celsius
