D425 - INTO TO CHEMISTRY QUESTIONS AND
ANSWERS
Chemistry
_______________is the study of matter.
Matter
_______________ is anything that has mass and takes up physical space, and it is
everywhere around you.
atoms
Matter is composed of ______________, the smallest units of matter that retain their
chemical properties.
composition, properties, and transformations
When chemists study matter, they study its __________________,
_________________, and _______________.
central science
Chemistry is regarded as a ________________. It connects biology, medicine, earth
science, environmental science, geology, physics, and mathematics.
Mass
_________________ is a measure of the amount of matter that an object contains, and
though many people use the terms interchangeably, mass is not the same as weight.
Mass is essentially constant, while weight is affected by gravitational pull.
Volume
_________________ is the amount of physical space a substance or object occupies.
When you measure liquid ingredients for a recipe, you measure the amount of space
the liquid fills.
1. Pure substance
2. Mixture
,Matter can be divided into 2 categories:
pure substance
2 categories of matter
A ___________________, also referred to as a substance, has constant composition
and is made up of a single type of element or compound.
mixture
2 categories of matter
A ____________________ is the physical combination of two or more substances
subatomic particles
The components of an atom are referred to as ___________________ and include the
electron, proton, and neutron.
1. Electron
2. Proton
3. Neutron
What are the component of an atom?
Elements
__________________ are composed of a single type of atom, either as a single atom
or chemically bonded together.
periodic table
The _______________________ displays all known elements according to similarities
between elements' properties.
Matter
What makes up all of the material in the universe?
Mixtures
Elements
Matter
Pure substances
,periodic table
__________________ a chart that displays all the known elements according to the
similarities between elements' properties.
1. uniform pure substances
2. mixtures.
matter can be classified into two broad categories:
pure substance
A ________________ is a form of matter that has a constant composition (meaning that
it is the same everywhere) and properties that are constant throughout the sample. Pure
substances can either be elements or compounds. Aluminum, from which soda cans
are made, is an example of a pure substance that is also considered an element. A
sample of aluminum would contain only aluminum atoms, all of which are arranged
(ordered) in the same way throughout the sample.
compound
A substance made up of two or more different elements chemically bonded together is
called a _________________. __________________ are pure substances as they
have uniform and definite composition. An example of a compound would be ordinary
(non-iodized) table salt, also called sodium chloride. All samples of sodium chloride are
chemically identical with the same ratio of sodium to chlorine. Another example would
be water, a compound consisting of two elements: hydrogen and oxygen.
118
there are about _________________ elements in the known universe.
Mixtures
_____________________ are the second category of matter and are a physical blend
of two or more pure substances, each of which retains its own identity and properties in
the mixture, like the salt water example. Only the form of the salt changes when it is
dissolved into water. It retains its composition and properties.
1. Homogenous mixture
2. Heterogeneous mixture
What are the 2 types of mixtures?
homogeneous mixture
, 2 types of mixtures
A __________________ is a mixture whose composition is uniform throughout the
mixture. The salt water described above is homogeneous because the dissolved salt is
evenly distributed throughout the entire salt water sample. in the
____________________ of salt water, the amount of salt in the salt water can vary from
one sample to another.
heterogeneous mixture
2 types of mixtures
A ______________________ is a mixture in which the composition is not uniform
throughout the mixture. Vegetable soup is a ______________________. Any given
spoonful of soup will contain varying amounts of the different vegetables and other
components of the soup.
Homogeneous
_________________________mixtures exist in a single phase or layer as they have
uniform composition throughout.
Heterogeneous
____________________mixtures have two or more phases as they do not have
uniform composition. For example, oil and water do not mix well and separate into two
phases.
alloy
An _______________________ is a mixture composed of two or more elements, at
least one of which is a metal.
Brass
_________________ is an alloy of copper and zinc.
Bronze
__________________ is an alloy of copper and tin.
manufactured items
Alloys are commonly used in ______________________ because the properties of
these metal mixtures are often superior to a pure metal.
ANSWERS
Chemistry
_______________is the study of matter.
Matter
_______________ is anything that has mass and takes up physical space, and it is
everywhere around you.
atoms
Matter is composed of ______________, the smallest units of matter that retain their
chemical properties.
composition, properties, and transformations
When chemists study matter, they study its __________________,
_________________, and _______________.
central science
Chemistry is regarded as a ________________. It connects biology, medicine, earth
science, environmental science, geology, physics, and mathematics.
Mass
_________________ is a measure of the amount of matter that an object contains, and
though many people use the terms interchangeably, mass is not the same as weight.
Mass is essentially constant, while weight is affected by gravitational pull.
Volume
_________________ is the amount of physical space a substance or object occupies.
When you measure liquid ingredients for a recipe, you measure the amount of space
the liquid fills.
1. Pure substance
2. Mixture
,Matter can be divided into 2 categories:
pure substance
2 categories of matter
A ___________________, also referred to as a substance, has constant composition
and is made up of a single type of element or compound.
mixture
2 categories of matter
A ____________________ is the physical combination of two or more substances
subatomic particles
The components of an atom are referred to as ___________________ and include the
electron, proton, and neutron.
1. Electron
2. Proton
3. Neutron
What are the component of an atom?
Elements
__________________ are composed of a single type of atom, either as a single atom
or chemically bonded together.
periodic table
The _______________________ displays all known elements according to similarities
between elements' properties.
Matter
What makes up all of the material in the universe?
Mixtures
Elements
Matter
Pure substances
,periodic table
__________________ a chart that displays all the known elements according to the
similarities between elements' properties.
1. uniform pure substances
2. mixtures.
matter can be classified into two broad categories:
pure substance
A ________________ is a form of matter that has a constant composition (meaning that
it is the same everywhere) and properties that are constant throughout the sample. Pure
substances can either be elements or compounds. Aluminum, from which soda cans
are made, is an example of a pure substance that is also considered an element. A
sample of aluminum would contain only aluminum atoms, all of which are arranged
(ordered) in the same way throughout the sample.
compound
A substance made up of two or more different elements chemically bonded together is
called a _________________. __________________ are pure substances as they
have uniform and definite composition. An example of a compound would be ordinary
(non-iodized) table salt, also called sodium chloride. All samples of sodium chloride are
chemically identical with the same ratio of sodium to chlorine. Another example would
be water, a compound consisting of two elements: hydrogen and oxygen.
118
there are about _________________ elements in the known universe.
Mixtures
_____________________ are the second category of matter and are a physical blend
of two or more pure substances, each of which retains its own identity and properties in
the mixture, like the salt water example. Only the form of the salt changes when it is
dissolved into water. It retains its composition and properties.
1. Homogenous mixture
2. Heterogeneous mixture
What are the 2 types of mixtures?
homogeneous mixture
, 2 types of mixtures
A __________________ is a mixture whose composition is uniform throughout the
mixture. The salt water described above is homogeneous because the dissolved salt is
evenly distributed throughout the entire salt water sample. in the
____________________ of salt water, the amount of salt in the salt water can vary from
one sample to another.
heterogeneous mixture
2 types of mixtures
A ______________________ is a mixture in which the composition is not uniform
throughout the mixture. Vegetable soup is a ______________________. Any given
spoonful of soup will contain varying amounts of the different vegetables and other
components of the soup.
Homogeneous
_________________________mixtures exist in a single phase or layer as they have
uniform composition throughout.
Heterogeneous
____________________mixtures have two or more phases as they do not have
uniform composition. For example, oil and water do not mix well and separate into two
phases.
alloy
An _______________________ is a mixture composed of two or more elements, at
least one of which is a metal.
Brass
_________________ is an alloy of copper and zinc.
Bronze
__________________ is an alloy of copper and tin.
manufactured items
Alloys are commonly used in ______________________ because the properties of
these metal mixtures are often superior to a pure metal.
