WEEK 1-4 Flashcards
1
Q
CHEMISTRY IS THE SCIENCE THAT INVESTIGATES THE HUMAN MIND AND BEHAVIOR.
A
False
2
Q
THE STUDY OF THE PHYSICAL AND CHEMICAL CHANGES INVOLVED IN THE PROCESS OF DEATH IS:
A
Thanatochemistry
3
Q
A COVALENT BOND IS A CHEMICAL BOND IN WHICH ELECTRONS ARE SHARED BETWEEN ATOMS.
A
True
4
Q
WHICH OF THE FOLLOWING BRANCHES OF CHEMISTRY DEALS WITH INANIMATE MATTER?
A
Inorganic Chemistry
5
Q
THE PREFIX BIO-MEANS:
A
Life
6
Q
THE SUFFIX -OUS, INDICATES THE HIGHER VALENCE FORM OF AN ELEMENT WITH MORE THAN ONE POSSIBLE VALENCE.
A
False
7
Q
ARGON AND NEON ARE:
A
Noble Gases, and have a Valence of Zero
8
Q
A SUBSCRIPT IS A NUMBER, WRITTEN SLIGHTLY BELOW THE LINE, THAT PRECEDES THE SYMBOL FOR AN ELEMENT AND INDICATES THE NUMBER OF ATOMS OF THAT ELEMENT THAT ARE PRESENT IN A COMPOUND.
A
False
9
Q
THE VALENCE OF THE ELEMENT BARIUM IS:
A
+2
10
Q
THE CHEMICAL SYMBOL FOR THE ELEMENT MAGNESIUM IS: WRITTEN AS:
A
Mg
11
Q
A VOLUME OF 16cc IS THE EQUIVALENT OF A VOLUME OF:
A
16mL
12
Q
WATER FREEZES AT ___________ DEGREES IN THE CELSIUS TEMPERATURE SCALE.
A
0
13
Q
WHICH OF THE FOLLOWING IS THE STANDARD UNIT OF MASS?
A
Kilogram
14
Q
THE ELEMENT SODIUM HAS THE SYMBOL ________, AND A VALENCE OF _____.
A
Na, +1
15
Q
THE SYMBOL FOR A HYDROXIDE RADICAL IS:
A
(OH)-1
16
Q
WHAT IS THE VALENCE OF Ne?
A
0
17
Q
WHAT IS THE VALENCE OF OXYGEN?
A
-2
18
Q
CUPRIC’S VALENCE IS
A
+2
19
Q
ELEMENTS ARE SUBSTANCES THAT CAN ONLY BE BROKEN DOWN INTO SIMPLER SUBSTANCES BY CHEMICAL MEANS.
A
False
20
Q
WHICH POLYATOMIC ION IS REPRESENTED BY THE SYMBOL (NH4)+1 ?
A
Ammonium
21
Q
NITRATE HAS _____ OXYGEN ATOMS AND NITRITE HAS _____ OXYGEN ATOMS.
A
3,2
22
Q
THE QUANTITY OF HEAT NECESSARY TO RAISE THE TEMPERATURE OF 1 GRAM OF WATER 1 DEGREE CELSIUS WHILE AT 15 DEGREES CELSIUS IS THE _________.
A
Calories
23
Q
Ag IS THE SYMBOL FOR
A
Silver
24
Q
METALS ARE ELECTRON DONORS
A
True
25
WHAT IS THE SYMBOL FOR TETRABORATE?
(B4O7)-2
26
THE STANDARD UNIT OF VOLUME IS THE ___________.
Liter
27
THE BRANCH OF CHEMISTRY THAT STUDIES COVALENTLY BONDED CARBON COMPOUNDS IS
Organic Chemistry
28
THE PREFIX "MICRO-" EQUALS:
1/1,000,000
29
NORMAL HUMAN BODY TEMPERATURE ON THE CELSIUS SCALE IS _______ DEGREES.
37
30
WHAT IS CHLORINE'S CLASS?
Halogen
31
THE COMBINING CAPACITY OF AN ELEMENT IS KNOWN AS ITS ____________.
Valence
32
THE CHEMICAL SYMBOL FOR MERCURY IS ⁃
Hg
33
WHAT DOES THE PREFIX "CENTI-" REPRESENT?
1/100
34
NEON IS A NOBLE GAS AND HAS A VALENCE OF -1.
False
35
WHICH OF THE FOLLOWING IS THE STANDARD UNIT OF LENGTH?
Meter
36
WHICH OF THE FOLLOWING IS NOT A PHYSICAL PROPERTY OF MATTER?
Combustibility
37
______________ IS DEFINED AS ANYTHING THAT HAS MASS AND TAKES UP SPACE.
Matter
38
THE ABILITY OF A SUBSTANCE TO ABSORB WATER IS _____________.
Hygroscopicity
39
MASS AND WEIGHT ARE NOT THE SAME THING. MASS DEPENDS ON THE PULL OF GRAVITY.
False (weight depends on the pull of gravity)
40
WHICH OF THE FOLLOWING IS NOT AN EXAMPLE OF A CHEMICAL CHANGE?
SUBLIMATION OF DRY ICE
41
_______________ CAN INTERFERE WITH THE DIFFUSION OF EMBALMING CHEMICALS FROM THE CAPILLARIES INTO THE TISSUES DURING THE EMBALMING PROCESS.
- Surface Tension
42
THE CHANGE OF STATE EXHIBITED BY SOLID EMBALMING POWDERS AS THEY WORK IS:
Sublimation
43
A SUBSTANCE THAT EXHIBITS A QUALITY WHERE IT IS EASILY CONVERTED AT A RELATIVELY LOW TEMPERATURE FROM THE LIQUID TO THE GASEOUS STATE IS DESCRIBED AS:
Volatile
44
WHICH STATE OF MATTER HAS PARTICLES WITH STRONG ATTRACTIVE FORCES FOR EACH OTHER?
Solid
45
A GAS HAS A DEFINITE VOLUME BUT NO DEFINITE SHAPE.
False (gas has no definite shape or volume)
46
OXYGEN IS A NONMETAL.
True
47
TWO OR MORE ELEMENTS CHEMICALLY COMBINED ARE A ______________, WHILE TWO OR MORE ELEMENTS PHYSICALLY COMBINED ARE A ______________.
Compound, Mixture
48
THE ELEMENTS ARE ARRANGED IN THE PERIODIC TABLE IN ORDER OF
Increasing Atomic Number
49
METALS FORM POSITIVE IONS BECAUSE THEY DONATE ELECTRONS WHEN BONDING WITH OTHER ELEMENTS.
True
50
THE COMPOUND H2SO4 CONTAINS:
2 ATOMS OF HYDOGEN, 1 ATOM OF SULFUR, AND 4 ATOMS OF OXYGEN
51
MOLECULES ARE THE SMALLEST PARTICLE OF AN ELEMENT THAT HAVE ALL THE PROPERTIES OF THAT ELEMENT.
False (molecules are the smallest particle of a compound that can exist alone and still have the properties of that compound)
52
THE SMALLEST PARTICLE OF AN ELEMENT THAT CAN ENTER INTO A CHEMICAL REACTION IS A(N):
Atom
53
IN THE CHEMICAL EQUATION, H2 + O2 -----> 2 H2O , O2 IS A __________________.
Reactant
54
_____________ ARE THE FUNDAMENTAL BUILDING BLOCKS THAT MAKE UP ALL MATTER.
Atom
55
CHEMICAL REACTIONS ARE ORDERLY REARRANGEMENTS OF
Atoms
56
SOLID CARBON DIOXIDE UNDERGOES ______________ AS IT CHANGES DIRECTLY FROM A SOLID TO A GAS.
Sublimation
57
SODIUM CHLORIDE, ALSO KNOWN AS TABLE SALT, CONTAINS ____ ATOM(S) OF SODIUM AND ____ ATOM(S) OF CHLORINE.
1,2
58
WHICH OF THE FOLLOWING IS NOT A CHARACTERISTIC OF PLASMA?
Dry Ice
59
AN ELEMENT'S POSITION ON THE PERIODIC TABLE IS DETERMINED BY ITS:
Atomic number
60
WHICH PHYSICAL STATE OF MATTER HAS A DEFINITE SHAPE AND VOLUME?
Solid
61
THE STANDARD UNIT OF MASS IS THE
Kilogram
62
MERCURIC'S VALENCE IS
+2
63
(NO3) -1 IS THE SYMBOL FOR WHICH OF THE FOLLOWING RADICALS?
Nitrate
64
WHAT IS THE ABILITY OF A SUBSTANCE TO BURN?
Combustibility
65
A LIQUID'S RESISTANCE TO FLOW IS KNOWN AS
Viscosity
66
A CHEMICAL PROPERTY INDICATES HOW A SUBSTANCE REACTS WITH SOMETHING ELSE.
True
67
REACTIVITY REFERS TO THE RATE AT WHICH A CHEMICAL SUBSTANCE UNDERGOES A PHYSICAL CHANGE.
False (chemical change)
68
WHICH IS NOT A PHYSICAL PROPERTY OF MATTER?
Combustibility
69
CATEGORIZE THE FOLLOWING AS A PHYSICAL OR CHEMICAL CHANGE: “FREEZING”
Physical
70
IF YOU TRAVEL TO THE MOON, YOUR WEIGHT WILL BE ________ BECAUSE F THE ________ IN GRAVITY.
Less, Decrease
71
PUT THE STATES OF MATTER IN ORDER FROM MOST DENSE TO LEAST DENSE.
Solid, Liquid, Gas
72
WHAT INDICATES THE NUMBER OF ATOMS OF A PARTICULAR ELEMENT PRESENT IN A COMPOUND?
Chemical Formula
73
____________ REFERS TO THE MASS OF A SUBSTANCE DIVIDED BY ITS VOLUME.
Density
74
THE QUANTITY OF MATTER IN AN OBJECT IS:
Mass
75
TWO OR MORE ELEMENTS PHYSICALLY COMBINED FORM A:
Mixture
76
Atoms are divisible.
False
77
Planetary electrons are involved in forming bonds with other atoms.
False
78
The net charge of the nucleus is positive.
True
79
Which two subatomic particle's have the same mass?
Protons and Neutrons
80
Which subatomic particle has no charge?
Neutron
81
Atomic number is equal to the number of ______?
Protons
82
Atomic mass is equal to the sum of protons and electrons.
False (protons and neutrons)
83
The number of protons is equal to the number of electrons in a neutral atom.
True
84
The element Li (lithium) has:
atomic number: 3
atomic mass: 7
Identify the correct numbers of protons, electrons and neutrons for this element.
Protons: 3
Electrons: 3
Neutrons: 4
85
Hydrogen (atomic mass =1 and atomic number =1) has 1 neutron.
False (atomic=1 and atomic number=1) has 0 neutron
86
Determine for Li. Li has an atomic number of 3 and an atomic mass of 7.
number of protons:
number of electrons:
number of neutrons:
valence number:
Protons=3
Electrons=3
Neutrons=4
Valence number= +1
87
Electrons are located in the nucleus.
False
88
Noble gases are an example of inert substances.
True
89
Determine for Cl. Cl has an atomic number of 17 and an atomic mass of 35.
number of protons:
number of electrons:
number of neutrons:
valence number:
protons= 17
electrons=17
neutrons= 18
valence number= -1
90
The octet rule states that atoms must obtain how many electrons in their outermost shell to achieve stability?
2 or 8
91
Metals form cations
True
92
For Al3+ how many electrons have been gained or lost?
3
93
For Al3+ have electrons been gained or lost?
Lost
94
Calculate for Na+. (Atomic number = 11, Atomic mass= 23)
number of protons:
number of electrons:
number of neutrons:
number of protons= 11
number of electrons = 10
number of neutrons= 12
95
How do atoms and ions differ?
In the presence of a charge
96
Isotopes of the same element will have a different number of _____.
Neutrons
97
What is the number protons, electrons, and neutrons for each of the following isotopes of Lithium? (Atomic number 3)
Li- 6
Li-7
Li-8
Li- 6
protons= 3
electrons=3
neutrons=3
Li-7
protons=3
electrons=3
neutrons=4
Li-8
protons= 3
electrons=3
neutrons=5
98
Isotopes are named for their atomic number.
False (Atomic Mass)
99
What is the number protons, electrons, and neutrons for each of the following isotopes of Nitrogen (Atomic number 7)
N-14
N-15
N-14
protons=7
electrons=7
neutrons= 7
N-15
protons=7
electrons=7
neutrons= 8
100
In isotopes, atomic number is _____ and atomic mass is _______
The same, different
101
Which subatomic particle has negligible mass?
Electron
102
What is a positive subatomic particle having a mass of one?
Proton
103
What is a substances ability to dissolve?
Solubility
104
Which branch of chemistry deals with inanimate or lifeless matter?
Inorganic chemistry
105
What determines the position an element will take on the periodic table?
It's atomic number
106
The electrons found in the outer orbit are known as the valence electrons.
True
107
Which element has no neutron(s)?
Hydrogen
108
Determine for Magnesium (Mg), Atomic number =12, atomic mass= 24.
Number of protons:
Number of electrons:
Number of neutrons:
Valence number:
Number of protons: 12
Number of electrons:12
Number of neutrons: 12
Valence number: +2
109
What is the smallest particle that has all of the properties of an element?
Atom
110
Atoms that have gained electrons become negatively charged ions.
True
111
What does the charge of an ion indicate?
The number of electrons gained or lost
112
What is the small central very dense portion of the atom called?
Nucleus
113
The overall charge of the nucleus is positive.
True
114
What is the fundamental unit of an element that takes part in a chemical reaction?
Atom
115
Loss of electrons equals negative valence number.
False (positive valence number)
116
Which subatomic particle has no charge?
Neutron
117
Isotopes have a different atomic number and the same atomic mass.
False (same atomic number and different atomic mass)
118
The charge of an ion is neutral.
False
119
Ions carry a charge because the proton and electron number are different.
True
120
The electron is the part of the atom involved in a chemical reaction.
True
121
The nucleus contains neutrons and electrons, the heavy components of an atom.
False (neutron and protons)
122
Molecules are too small to maintain a stable existence.
False
123
Which of the following is NOT a diatomic molecule?
Lithium
124
The bonds that hold diatomic molecules together are covalent bonds.
True
125
How many molecules are present in a polyatomic molecule?
more than 2
126
Most elements are polyatomic.
False
127
Sodium is not a diatomic molecule. The correct way to tell that there are 2 sodiums present is Na2.
False
128
The molecular coefficient only applies to the number it is written next to.
False
129
Use the molecular coefficient to determine the number of each element in 2 P4 O10.
P=8
O=20
130
The molecular coefficient tells us how the number of molecules in the compound.
True
131
Use the molecular coefficient to determine the number of each element in 4S F2.
S=4
F=8
132
Molecular coefficients should be ignored when calculating molecular weight.
False
133
Molecular weight is the sum of the atomic masses that make up the compound.
True
134
Calculate the molecular weight of 2NaCl. Na has an atomic mass of 23 and Cl has an atomic mass of 35.
116
135
Calculate the molecular weight for 3Al(NO3)3. Al has an atomic mass of 27, N has an atomic mass of 14, and O has an atomic mass of 16.
639
136
Calculate the molecular weight of 3Na2O . Na has a atomic mass 23 and O has an atomic mass of 16.
186
137
Which of the following is a metalloid.
Ge
138
Elements are arranged in the periodic table according to_____?
atomic number
139
Metals form positive ions because they are electron donors.
True
140
Nonmetals lose electrons to form negative ions.
False ( gain electrons to form negative ions)
141
Elements in the same group have similar properties but do not have the same number of valence electrons.
False (same group or family have similar properties and they have the same number of valence electrons)
142
Name the compound N2O4.
Dinitrogen tetroxide
143
Two or more elements chemically combined in definite proportions make up a compound.
True
144
Form the compound that results from the combination of Ca and Cl.
CaCl2
145
Name the compound LiCl.
lithium chloride
146
Form the compound that results when Mg and Cl combine.
MgCl2
147
When you name a ternary salt you put the name of its 2 components.
True
148
A base is composed of a metal plus a hydroxide radical.
True
149
Which element is essential in identifying an acid .
Hydrogen
150
A ternary acid has the prefix hydro in its name.
False
151
The name of Li2O is lithium oxide.
True
152
What type of substance's components retain their own properties & can be separated by physical means?
Mixtures
153
Ionic compounds are made up of a _____and ________.
metal, non-metal
154
What does the number of atoms present times the atomic weight of the elements in a compound determine?
Molecular weight
155
What is the molecular weight of 2H2O when Hydrogen has an atomic mass of 1 & Oxygen has an atomic mass of 16?
36
156
Most elements are monatomic.
True
157
What are known to be salt formers?
Halogens
158
What is an element with one atom in its molecule.
Monatomic ion
159
What is the name of (CO3)-2 ?
Carbonate
160
What does the molecular coefficient tell you?
The number of molecules in the compound
161
A diatomic molecule is....
an element that has two atoms in its molecule
162
Properties of the elements are periodic functions of the atomic number.
True
163
What is the symbol for Phosphate?
(PO4)-3
164
What are the vertical columns on the periodic table called?
Groups or Families
165
When a molecular coefficient is involved it is distributed to everything in that symbol or formula.
True
166
Metals are electron receivers.
False (electron donors)
167
Which of the following elements is NOT diatomic?
Carbon
168
A ternary salt has a radical in its formula.
True
169
What tells the number of atoms present in a molecule?
subscript
170
What are the horizontal rows on the periodic table called?
Periods
171
Elements in the same group or family have similar properties because they...
Have the same number of valence electrons.
