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Chemistry 1st Semester Exam review Flashcards | StudBud
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Chemistry 1st Semester Exam review
Chemistry 1st Semester Exam review
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1
Which of the following has the correct definition of a nucleus?
The main part of the cell that controls everything within it.
There's no such thing.
Gives support and protection to cell; made of cellulose in plants.
A part of a cell that controls 2/4s of everything in a cell.
2
Heterogeneous mixture
The substances are not evenly mixed (Trail mix)
Substances are evenly mixed (soda)
3
A hypothesis must be ______________.
tested
written in caps
1000 words and double spaced
a question
4
Found in seafood
Calcium
Bones
Iodine
5
Changes in the atoms nucleus
Nuclear reaction
Chemical reaction
Physical change
6
Weight is the measure of the earths gravitational pull.
False
True
7
What is the definition of Volume?
The amount of space that a substance or object takes up.
How much stuff there is.
A book forming a part of a work series.
How loud something is.
8
How is the metal aluminum used?
make soda cans
clean bottle caps
make paper
9
Qualitative data uses
your senses
numbers
verbs
nouns
10
graphite can be scratched with your finger nail
False
True
11
definition of frequency is...
a measure of the number of times a wave cycles per unit of time.
the vertical distance from its equilibrium point to its crest [height].
is the distance betweenconsecutive crests (or consecutive troughs).
the horizontal distance from the equilibrium point of a wave to the next.
12
The columns on the Periodic table are called?
groups
periods
shields
clans
13
Is hydrogen explosive?
yes
no
14
Helium in a balloon?
Gas
Solid
Liquid
15
Matter with uniform and unchanging composition
substance
element
states of matter
mixture
16
freezing point celsius
373
273
0
100
17
Colorless, odorless and relatively unreactive
Nitrogen
Carbon
Oxygen
18
what is the definition of a gas
has no definite shape but definite volume
has a definite shape and volume
has no definite shape or volume
19
What is amplitude.
How high a wave is.
How many waves per second.
How far apart wave is.
20
Atoms of different elements combine to form
ions
absolute zero
protons
compounds
21
Change in which a new substance is formed
physical change
chemical change
22
Electrons in the outermost orbitals.
Far electrons
Creepy Electrons
Hund Electrons
Valence Electrons
23
Group 1A elements are called
Noble Gases
Alkali metals
Halogens
Alkaline Earth metals
24
no charge particles
number of protons
neutrons
negatively charged particleselectronsC
positively charged particles
25
Helium is a nonmetal
True
False
26
Graphite is soft because...
There are weak forces in between the layers
It has 3 covalent bonds to each carbon atom
There are no free electrons
There are free electrons
27
Where electrons "live"
Nucleus
Orbitals
Carrabassett Valley
Avon
28
hydrochloric acid
sanitizes hands
sterilizes instruments
also called bleach
stomach acid
29
The control is the One thing you change in an experiment?
True
False
30
Most abundant alkali metals
Flourine and sodium
Copper and silver
Sodium and potassium
31
what does calcium do
makes amino acids
creates blood cells
help bone structure
makes protein
32
no definite shape or volume
all 3
solid
liquid
gas
33
Atoms have electrons, neutrons, and ____.
electrons
protons
neutrons
34
physical change definition
total energy of all paticals in an object
makes a new substances with propterys different from the origanol
a change of matter that proudeces one or more new substances
alters the form or apearances but does not change into a new one
35
How do you find Atomic Mass?
Electrons + Neutrons
Just Protons
Protons + Electrons
Protons + Neutrons
36
A deadly gas
Hydrogen
Oxygen
Chlorine
37
Which definition describes the mass number?
The number of protons
The number of protons and neutrons
The number of protons and electrons
The number of neutrons and electrons
38
What percentage of oxygen is in the atmosphere?
78
21
14
79
39
uniform and unchanging composition
Substance
Gas
Matter
40
4 states of matter
Idk
only 3
Massachusetts, New Hampshire, Vermont, Maine.
Gas, liquid, solid, plasma
41
Creator of Periodic Table
Mendeleev
Chadwick
Einstein
Thomson
42
The definition of an orbital is....
Where you find electrons
How things move around atoms
An area where the probability of finding an electron is high
An area where the probability of finding an electron is low
43
Group number of alkaline earth metals
17
1
18
2
44
How are compounds created?
Two elements chemically combined together
Two elements combined physically
They are put together
45
The sum of protons and neutrons around the nucleus
mass amount
average atomic mass
mass number
atomic number
46
What part of the electromagnetic spectrum can we see?
Visible Light
Ultraviolet, visible light, and infrared rays
We can see the entire spectrum
Infrared Rays and ultraviolet rays
47
Ground state is the..?
lowest allowable state of an atom
highest allowable energy state of an atom.
smallest allowable state of an atom
equal allowable state of an atom
48
Where are neutrons found?
In the nucleus
In shells
Orbiting the nucleus
49
Study of the structure of matter.
Anatomy
Chemistry
Biology
50
Elements of the same group have similar _____________
Names
Numbers of electrons
Chemical properties
Physical Properties
51
What is the definition of a hypothesis in science?
an article
your friend’s answer
an observation
an educated guess
52
Combustion (burning) is an ...
endothermic chemical reaction
exothermic physical reaction
endothermic physical reaction
exothermic chemical reaction
53
what is the definition of chemical change change
Protons, Neutrons, and electronons
a physical change
matter
it is when something combines with another to form a substance,
54
What is the definition of scientific methods?
An educated guess
A step-by-step process to follow
Organized ways to answer questions and solve problems.
A conclusion drawn from data and observations
55
Substance with one type of atom
molecule
element
compound
cell
56
Added to toothpaste and some drinking water
Sugar
Chlorine
Flourine
57
What is matter?
I dont know
Matter is anything that has mass and takes up space
Matter is a something that will destroy things
Matter is a word?
58
physical change
change that occurs without altering the chemical composition
changing physical reactions
59
What do CFC's destroy?
the atmosphere
the ozone layer
the troposphere
cloud formation
60
Unit of measure for mass
liters
kilograms
meters
matter
61
What is in the nucleus?
electrons
electrons and protons
neutrons
protons and neutrons
62
Define the term data
facts that support an idea
an organised collection of data.
facts and statistics collected
63
Matter that flows and takes the shape of its container
all of them
liquid
solid
gas
64
Is essential for healthy bones and teeth
Sodium
Calcium
Iron
Magnesium
65
What is precision?
How important something is.
How consistent your results are
How exact you are.
How big something is.
66
How many times can aluminum be recycled?
One Time
five times
Ten times
As much as you want
67
Ions are...
Always negative
Charged particles formed when atoms lose or gain electrons
Very unreactive
Always positive
68
A rainbow is an example of what quality of light?
spectator
spectrum
respect
species
69
The rows on the Periodic table are called?
groups
periods
shields
families
70
Hydrogen is not essential for life
False
True
71
What is on the periodic table?
stars
elements
planets
people
72
Proposed a quantum model for the hydrogen atom
Niels Bohr
JJ Thompson
James Chadwick
Ernest Rutherford
73
The space occupied by an object
Volume
Velocity
Density
Mass
74
The mass can tell you
how much matter is in an object
how much density an object has
how much volume a object has
how much a object weighs
