What is atomic theory?

Everything is made up of tiny particles called atoms.

removal of factors that could create unanticipated results.

What is a dependent variable in scientific experimentation?

The variable that changes in response to the IV.

What were we witnessing in this lab?

Electrons coming down from the excited state

What does the atomic number do?

Tell the amount of protons and electrons (if neutral)

Define Empirical Formula:

The simplest whole-number ratios by which elements combine.

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Midterm Review

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Questions 96

Answers

1
Which of the following laboratory tools is a beaker?
3rd one
2nd one
1st one
4th one
2
What subatomic particle(s) is (are) in the nucleus?
Neutrons and electrons
Protons and Neutrons
Electrons
Protons
3
In nuclear notation, what does the top left number represent?
Mass Number
Atomic Number
Neutrons
Electrons
4
What is the IONIC CHARGE of Aluminum?
3+
1+
2+
5
Atomic Number?
9
10
8
7
6
What is atomic theory?
Everything is made up of tiny particles called atoms.
Most atoms are metals.
Atoms make up compounds.
Atoms can be rearranged to form new elements.
7
When a neutral atom loses electrons it becomes a _________.
Cation
Onion
Sad atom
Anion
8
The conversion of the atom of one element into the atom of another element.
Radioactivity
Half-life
Magic
Transmutation
9
What is the volume measurement in this instrument?
57.0 mL
57 mL
43.0 mL
43 mL
10
Which of the following is a SAFETY tool?
fire blanket
graduated cylinder
measuring spoons
stopwatch
11
Silicon’s atomic mass is 28.086. Which isotope is the most abundant?
Silicon—28
Si—30
Silicon—14
Silicon—29
12
The elements on the left side of the stair steps are __________
Noble gases
Nonmetals
Metals
Halogens
13
A mixture is ________ together.
Blended
Living
Bonded
Fused
14
Name the ionic compound Li₂CN
Lithium cyanide
Lithium monocyanide
Dilithium cyanide
Dilithium monocyanide
15
How many significant figures does this number have?
6
3
7
8
16
NO is a COVALENT FORMULA called:
Mononitrogen Monoxide
Mononitrogen Oxide
Nitrogen Monoxide
Nitrogen Oxide
17
Which describes this nuclear reaction?
Uranium undergoing alpha decay
Alpha Bombardent
Thorium undergoing alpha decay
Nuclear Fusion
18
Which type of radiation is symbolized by this particle?
Positron particle
Beta particle
Alpha particle
Gamma particle
19
A control is:
misleading a subject.
removal of factors that could create unanticipated results.
regulating a subjects behavior.
ensuring subjects don't learn the details of the experiment.
20
What is the name of this tool?
measuring spoon
measuring cup
beaker
graduated cylinder
21
What is the IONIC COMPOUND for Aluminum Sulfide?
Al3S2
Al2S3
22
How many significant figures for 987000?
5
4
3
6
23
What is the use of this tool?
measure height
measure volume
measure weight
measure mass
24
How many significant figures does 200000000. have?
10
1
8
9
25
The atomic number is the same as the
Molecules
Electrons
Neutrons
Protons
26
What is the formula for Calcium and Bromine bonding together?
Ca2Br
CaBr
CaBr2
C12H22O11
27
Is ammonia (NH₃) an ionic compound?
Yes
No
I have no idea!
28
Which of the following is NOT an example of a molecular formula?
B
O2
H2O
NH3
29
Which isn't ionic?
NO2
Mn2S5
NaI
CaCl2
30
what is the measurement on this triple beam balance
555.22g
540.8
542.45g
560.2g
31
What is a dependent variable in scientific experimentation?
The variable that is deliberately changed.
The variable that remains constant.
The variable that gets no treatment.
The variable that changes in response to the IV.
32
What did the gold foil experiment show about atomic structure
The atom is mostly comprised of electrons
The atom is mostly empty space
The atom is mostly comprised of neutrons
The atom is mostly comprised of alpha particles
33
What type of nuclear energy is pictured?
nuclear radiation
nuclear fission
nuclear fusion
nuclear meltdown
34
What were we witnessing in this lab?
How to find the colors of the rainbow
Did we do this lab
Electrons coming down from the excited state
The colors of light waves
35
How many significant figures does 200000000 have?
9
8
10
1
36
The heat energy from nuclear reactors comes from:
Fusion
Fission
Dwayne Johnson
Burning coal
37
What does the atomic number do?
Tell the amount of protons and electrons (if neutral)
Tell the amount of just neutrons
Tell the amount of just electrons
Tell the amount of just protons
38
The heat energy from nuclear reactors comes from:
Fusion
Fission
Dwayne Johnson
Burning coal
39
The atomic mass is the
Protons plus the neutrons
Atomic number
The number of protons
The weighted average
40
These measurements are descriptive and non-numeric
Quantitative
Heterogeneous
Qualitative
Homogeneous
41
The mass of a single atom is measured in ________.
Grams
Grains
amu
emu
42
What is the name of the ionic compound SrS?
Strontium Sulfate
Strontium Sulfide
Strontium Sulfur
Strontium Sulfuric acid
43
Formula : sulfur hexafluoride
S6F
SF6
S2F
SF2
44
Name the following ionic compound: KClO₃
Potassium Cobalt
Potassium Calcium
Potassium Chlorate
Potassium Chromium
45
The current atomic model would be revised if new information about an atom's structure were discovered.
True
False
46
_______ properties can be observed and measured without changing the object.
physical
mathematical
chemical
47
who developed atomic theory
Aristotle
John Dalton
me
Dwayne Johnson
48
Compared to chemical reactions, nuclear reactions produce:
proportionally far less energy
proportionally far more energy
fewer changes in the nucleus
the same atoms
49
Define Empirical Formula:
The expanded decimal ratios by which elements combine
The simplest whole-number ratios by which elements combine.
The simplest decimal ratios by which elements combine.
The expanded whole-number ratios by which elements combine.
50
Which particle is the most dangerous?
Positron
Beta
Alpha
Gamma
51
A variation of an element that has a different number of neutrons:
Rope a dope
Eon
Ion
Isotope
52
Least penetrating type of nuclear decay?
Beta
Fission
Gamma
Alpha
53
The force of gravity pushing down on an object is the object’s _______
Protons
Weight
Mass
Atomic number
54
The mixture in the bowl is a
Pure substance
Disgusting
Heterogeneous mixture
Homogeneous mixture
55
Ba₃(PO₄)₂ is the IONIC FORMULA for Barium Phosphate
False
True
56
Which of these is an empirical formula?
CO2
C2O4
C2H4O2
C3H6
57
An atom is made up of protons, electrons, and ________
Neutrons
DNA
Matter
Oxygen
58
If Sulfur is now an ion and has gained 2 electrons, what is its charge?
-3
+2
-2
+3
59
How many significant figures does 0.01 have ?
2
3
1
None.
60
Everyone in high school must pass Chemistry so you may as well try to pass it now.
True
False
61
Has some supporting research
Theory
Matter
Scientific Law
Hypothesis
62
How many significant figures does this number have?
2
3
1
63
Formula : iodine tribromide
IBr3
I2Br3
I3Br
IBr
64
Ionic Bonds are bonds between:
Metal and Non-Metal
Non-Metal and Non-Metal
Metal and Metal
65
The nuclear charge is:
Positive
Zero
Negative
Neutral
66
Which of the following is a molecular compound?
LiNO3
NaCl
C2H4
CaF2
67
The most tightly packed state of matter
Gas
Solid
Liquid
VSCO Girl
68
Name the following ionic compound: NiCO₃.
Nitrogen(III) carbonate
Nickel(II) cadmium
Nitrogen(I) chloride
Nickel(II) carbonate
69
What is the measurement?
16 mL
15.5 mL
15 mL
15.5 L
70
How many significant figures does this number have?
4
Who cares about numbers
3
5
71
Nuclear fission is used in ....
nuclear power plants
solar power
alpha decay
beta decay
72
This radioactive particle is actually an electron and has a -1 charge.
Positron
Alpha
Beta
Gamma
73
This milk is an example of a ________.
Blended mixture
Pure substance
Homogeneous mixture
Heterogeneous mixture
74
Formula : magnesium chloride
Mg2Cl
MgCl
MgCl2
Mg(ClO3)2
75
How many significant figures does 6.300 have?
3
4
1
2
76
How many protons are in an atom represented by the notation below?
36
114
42
78
77
Name the formula for the following ionic compound: aluminum hydroxide
Al(OH)3
3Al(OH)
Al3(OH)
78
Oxygen - 18 has how many protons?
9
18
16.00
8
79
What is the formula for the following ionic compound: copper(II) bromide
2CuBr
Cu2Br
CuBr2
80
In nuclear notation, what does the bottom left number represent?
Atomic Number
Neutrons
Electrons
Atomic Mass
81
How many significant figures are in 206?
2
1
4
3
82
Man-made global warming is a scientific fact or scientific law.
False
True
83
Formula : aluminum phosphate
Al(PO4)3
Al3PO4
AlPO4
AlP
84
This state of matter is easily compressed:
Plasma
Gas
Solid
Liquid
85
Discovered the electron using the Cathode Ray Tube experiment:
Ernest Rutherford
Democritus
Dwayne Johnson
J.J. Thomson
86
Which is best suited to handle a hot beaker?
rubber gloves
towel
tongs
paper napkin
87
What is the independent variable in this graph?
Mobile Phone Sales
The line
Year
88
Which liquid is the most dense?
vegetable oil
honey
corn syrup
water
89
In an ionic bond, atoms...
Donate/receive electrons from/to their outermost shell
Lose protons from the nucleus
Stick together
Lose all of their valence electrons
90
What type of nuclear decay is this?
gamma
alpha
beta
91
Which tool measures volume?
hand lens
graduated cylinder
mass
stopwatch
92
How close multiple measurements are to each other is called _______
Hypothesis
Accuracy
Closeness
Precision
93
How many significant figures does this number have?
1
4
Is this a trick
Too easy, 4
94
Type of nuclear decay with no mass and no charge?
Fission
Alpha
Gamma
Beta
95
This radioactive particle is heavy and cannot travel very far, so it can be stopped by paper or your skin.
Alpha
Positron
Gamma
Beta
96
How are Ionic Bonds formed?
two atoms bond together
transfer of electrons from one atom to another
sharing electrons between atoms
four atoms make a group together by bonding

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