Last Updated：2025/11/20
In chemistry, a group of elements with related properties similar to that of platinum, notably high resistance to chemical activity, particularly oxidation and reaction with acids. The platinum group consists of the elements ruthenium, rhodium, palladium, osmium, iridium, and platinum. In the periodic table of the elements they are in period 5 or 6 and in groups 8, 9 or 10.
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platinum group
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Source Word
platinum group
Noun
In
chemistry,
a
group
of
elements
with
related
properties
similar
to
that
of
platinum,
notably
high
resistance
to
chemical
activity,
particularly
oxidation
and
reaction
with
acids.
The
platinum
group
consists
of
the
elements
ruthenium,
rhodium,
palladium,
osmium,
iridium,
and
platinum.
In
the
periodic
table
of
the
elements
they
are
in
period
5
or
6
and
in
groups
8,
9
or
10.
Japanese Meaning
化学における、プラチナに類似した性質（高い化学的抵抗性、特に酸化や酸との反応に強い）の元素群を指します。具体的には、ルテニウム、ロジウム、パラジウム、オスミウム、イリジウム、プラチナが含まれ、周期表上では周期5または6、8、9、10族に位置しています。
Sense（1）
In
chemistry,
a
group
of
elements
with
related
properties
similar
to
that
of
platinum,
notably
high
resistance
to
chemical
activity,
particularly
oxidation
and
reaction
with
acids.
The
platinum
group
consists
of
the
elements
ruthenium,
rhodium,
palladium,
osmium,
iridium,
and
platinum.
In
the
periodic
table
of
the
elements
they
are
in
period
5
or
6
and
in
groups
8,
9
or
10.
