CHEM 1211 Test #1 Questions And
Answers 100% Verified
Chemistry - answer Study of matter, its transformations, and how it behaves
Matter - answer Any physical substance that occupies space and has mass. Consists of
molecules and atoms, and at the atomic and molecular level that chemical
transformations take place
Macroscopic Scale - answer Used to determine matter seen with the naked eye; where
observations take place
Atomic Scale (or molecular scale) - answer Is used when describing individual atoms or
molecules; describe and explain chemical processes here
Order of Magnitude - answer Determined by size, each class being a number of times
(usually ten) greater or smaller than the one before.
Element - answer Simplest type of matter and is a pure substance that CANNOT be
broken down or separated into simpler substance. Characterized by the number and
types of particles of which they are composed.
Atoms - answer Smallest indivisible unit of an element. Consist of 3 subatomic particles.
Protons, Neutrons, Electrons.
Chemical Compounds - answer Two or more elements are combined in a defined ration,
but they can be broken down
Molecules - answer Collections of atoms that are held together by chemical bonds
Pure Substance - answer Contains only one type of element or compound and has a
fixed chemical composition
Physical Properties - answer Do NOT change chemical composition of the material when
measured
Solid - answer At the macroscopic level, it is a dense material with a defined shape. At
the atomic level, atoms or molecules are closely packed together vibrating rapidly, but
not moving past one another.
Liquid - answer Flows and takes shape of the container. Atoms and molecules are
closely together and the vibrations allow them to move past one another
Gas - answer No fixed shape or volume. Cannot be seen with the naked eye, but at the
atomic level can be seen with the naked eye. Space widely apart, rapidly moving apart,
, and do not act strongly with each other
Melting Point - answer The temperature at which a solid converts into a liquid
Freezing Point - answer Occurs at the same temperature as the melting point as energy
is removed (temperature falls)
Boiling Point - answer The temperature at which a liquid converts into gas
Mixture - answer A substance made up of two or more elements or compounds that have
not reacted chemically
Homogeneous Mixtures (Solutions) - answer Mixtures that have a constant composition
throughout the material
Heterogenous Mixtures - answer Mixtures in which composition is not uniform
Meter --> Picometer - answer 1 meter = 10^12 pm
Meter --> Nanometer - answer 1 meter = 10^9 nm
Meter --> Micrometer - answer 1 meter = 10^6 micrometers
Fahrenheit Temperature - answer Freezing point of water is set at 32 F and boiling point
is 212 F
Celsius Temperature - answer Freezing point of water is 0 C and boiling point is 100 C
Kelvin Temperature - answer 0 K is 273.15 degrees lowers than 0 C
Absolute Zero - answer Lowest temperature possible, which is 0 K/-273.15 C
1 cubic centimeters = _____ mL - answer 1 mL
Answers 100% Verified
Chemistry - answer Study of matter, its transformations, and how it behaves
Matter - answer Any physical substance that occupies space and has mass. Consists of
molecules and atoms, and at the atomic and molecular level that chemical
transformations take place
Macroscopic Scale - answer Used to determine matter seen with the naked eye; where
observations take place
Atomic Scale (or molecular scale) - answer Is used when describing individual atoms or
molecules; describe and explain chemical processes here
Order of Magnitude - answer Determined by size, each class being a number of times
(usually ten) greater or smaller than the one before.
Element - answer Simplest type of matter and is a pure substance that CANNOT be
broken down or separated into simpler substance. Characterized by the number and
types of particles of which they are composed.
Atoms - answer Smallest indivisible unit of an element. Consist of 3 subatomic particles.
Protons, Neutrons, Electrons.
Chemical Compounds - answer Two or more elements are combined in a defined ration,
but they can be broken down
Molecules - answer Collections of atoms that are held together by chemical bonds
Pure Substance - answer Contains only one type of element or compound and has a
fixed chemical composition
Physical Properties - answer Do NOT change chemical composition of the material when
measured
Solid - answer At the macroscopic level, it is a dense material with a defined shape. At
the atomic level, atoms or molecules are closely packed together vibrating rapidly, but
not moving past one another.
Liquid - answer Flows and takes shape of the container. Atoms and molecules are
closely together and the vibrations allow them to move past one another
Gas - answer No fixed shape or volume. Cannot be seen with the naked eye, but at the
atomic level can be seen with the naked eye. Space widely apart, rapidly moving apart,
, and do not act strongly with each other
Melting Point - answer The temperature at which a solid converts into a liquid
Freezing Point - answer Occurs at the same temperature as the melting point as energy
is removed (temperature falls)
Boiling Point - answer The temperature at which a liquid converts into gas
Mixture - answer A substance made up of two or more elements or compounds that have
not reacted chemically
Homogeneous Mixtures (Solutions) - answer Mixtures that have a constant composition
throughout the material
Heterogenous Mixtures - answer Mixtures in which composition is not uniform
Meter --> Picometer - answer 1 meter = 10^12 pm
Meter --> Nanometer - answer 1 meter = 10^9 nm
Meter --> Micrometer - answer 1 meter = 10^6 micrometers
Fahrenheit Temperature - answer Freezing point of water is set at 32 F and boiling point
is 212 F
Celsius Temperature - answer Freezing point of water is 0 C and boiling point is 100 C
Kelvin Temperature - answer 0 K is 273.15 degrees lowers than 0 C
Absolute Zero - answer Lowest temperature possible, which is 0 K/-273.15 C
1 cubic centimeters = _____ mL - answer 1 mL
