What does the atomic number do?

Tell the amount of protons and electrons (if neutral)

What is atomic theory?

Everything is made up of tiny particles called atoms.

In an ionic bond, atoms...

Donate/receive electrons from/to their outermost shell

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.

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Midterm Review

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Questions 96

Answers

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

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