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Quantitative Chemistry
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Cards (19)
Atom
The
smallest
part of an element.
State
Symbol
(l) for liquid, (
g
) for gas, (s) for
solid
and (
aq
) for a solution, used in
symbol
equations.
Atomic
Mass
Mass of an atom in
grams
Mass
Number
Mass of the
protons
and
neutrons
in an atom, added together in
grams.
Proton Number
The number of
protons
in an atom, which is also the same number of
electrons
in an atom
Balanced
Equation
An equation where the number and type of
atoms
are the same for both the
reactants
and
products
Molecular Formula
A formula that shows the
total
number of the different kinds of
atoms
in a molecule
Conservation
of
Mass
No
atoms
are
lost
or
made
during a chemical
reaction
Relative Formula Mass
Sum of the
relative atomic masses
of the atoms shown in a chemical formula.
Thermal
Decomposition
When a compound breaks down with
heat
Moles
The relative
formula
mass of a substance in
grams
One mole
of any substance always contains the same number of
partiles.
One
moles contains 6.022 × 10²³ particles. This is known as the
Avogadro
number.
Relative Atomic Mass
Average mass
of the
atom
Relative Formula Mass
The
sum
of the relative
atomic
masses of each atom in the
formula
Total
mass
of elements = total
mass
of products
Atoms cannot be created in a
chemical reation
Atoms cannot be destroyed in a
chemical reaction
The
relative formula mass
is equal to the sum of the relative atomic masses of every atom in a
formula
