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26984 words
atom
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2 definitions • 2 examples
1
the
smallest
unit
of any
chemical
element
, consisting of a
positive
nucleus
surrounded
by
negative
electrons
.
Atoms
can
combine
to
form
a
molecule
:
Examples:
A
molecule
of
carbon
dioxide
(CO2) has one
carbon
atom and two
oxygen
atoms
.
figurative
He hasn't an atom of
sense
(= he has no
sense
), that boy.
2
the
smallest
unit
of any
chemical
element
, consisting of a
positive
nucleus
surrounded
by
negative
electrons
.
Atoms
can
combine
to
form
a
molecule
.
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