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the language of chemistry - Coggle Diagram
the language of chemistry
symbols
a symbol is the
short form
of an
atom
of a specific element or the
abbreviation
used for the name of an
element
.
significance of symbols
represents name of the element
represents one atom of the element
represents the definite mass of the element
introduction
a
molecule
is the smallest particle of matter that is capable of independent existence
a
pure substance
is made up of molecules containing the same kind of atoms
an
element
is a pure substance which cannot be decomposed into simpler substances
an
atom
is the smallest particle of an element that exhibits all the properties of that kind of element. It may or may not exist independently, but it can take part in a chemical reaction
the number of molecules in an
atom of that element
is called its
atomicity
(
molecules of element
)
diatomic
elements having two atoms in their molecules
h
ydrogen,
n
itrogen,
f
luorine,
o
xygen,
i
odine,
c
hlorine,
b
romine
triatomic
elements having three atoms in their molecules
ozone
monoatomic
elements having only one atom in their molecules
noble gases, metals and carbon
tetratomic
elements having four atoms in their molecules
phosphorus
octatomic
elements having four atoms in their molecules
sulphur
when atoms or molecules of different elements combine chemically in a fixed ratio, they form a
molecule of a compound
mixtures
(impure substances) include elements or compounds or both in no fixed proportion
homogenous mixtures have a uniform composition
heterogenous mixtures do not have a uniform composition
naming compounds
writing formulae
formula