potassium 音标拼音: [pət'æsiəm]
n . 钾[金属元素]
钾[金属元素]
potassium n 1 :
a light soft silver -
white metallic element of the alkali metal group ;
oxidizes rapidly in air and reacts violently with water ;
is abundant in nature in combined forms occurring in sea water and in carnallite and kainite and sylvite [
synonym : {
potassium }, {
K }, {
atomic number 19 }]
Potassium \
Po *
tas "
si *
um \,
n . [
NL .
See {
Potassa }, {
Potash }.]
(
Chem .)
An Alkali element ,
occurring abundantly but always combined ,
as in the chloride ,
sulphate ,
carbonate ,
or silicate ,
in the minerals sylvite ,
kainite ,
orthoclase ,
muscovite ,
etc .
Atomic weight 39 .
0 .
Symbol K (
Kalium ).
[
1913 Webster ]
Note :
It is reduced from the carbonate as a soft white metal ,
lighter than water ,
which oxidizes with the greatest readiness ,
and ,
to be preserved ,
must be kept under liquid hydrocarbons ,
as naphtha or kerosene .
Its compounds are very important ,
being used in glass making ,
soap making ,
in fertilizers ,
and in many drugs and chemicals .
[
1913 Webster ]
{
Potassium permanganate },
the salt {
KMnO4 },
crystallizing in dark red prisms having a greenish surface color ,
and dissolving in water with a beautiful purple red color ; --
used as an oxidizer and disinfectant .
The name {
chameleon mineral }
is applied to this salt and also to potassium manganate .
{
Potassium bitartrate }.
See {
Cream of tartar },
under {
Cream }.
[
1913 Webster ]
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Potassium: Sources, Deficiencies, Overdose, Treatment More Potassium: Benefits Side Effects Potassium: Overview, Uses, Side Effects, Precautions . . . - WebMD What is potassium and why do I need it? - BBC Food Potassium - MedlinePlus Potassium | Definition, Properties, Reactions | Britannica