ମୂଳ
ଯାହିତାହି
ପାଖାପାଖି
ଲଗ-ଇନ
ସଜାଣି
ଦାନ
ଉଇକିପିଡ଼ିଆ ବାବଦରେ
ଆମେ ଦାୟୀ ନୋହୁଁ
ଖୋଜନ୍ତୁ
ଛାଞ୍ଚ
:
Infobox potassium
ଭାଷା
ଦେଖିବେ
ସମ୍ପାଦନା
Potassium,
19
K
Potassium pearls under paraffin oil. The large pearl measures 0.5 cm. Below: spectral lines of potassium
ସାଧାରଣ ଗୁଣ
ନାମ,
ପ୍ରତୀକ
potassium, K
Appearance
silvery gray
ଉଚ୍ଚାରଣ
/
p
[invalid input: 'ɵ']
ˈ
t
æ
s
i
ə
m
/
po-
TAS
-ee-əm
Potassium in the
periodic table
Na
↑
K
↓
Rb
argon
←
potassium
→
calcium
ପରମାଣୁ କ୍ରମାଙ୍କ
(
Z
)
19
ଶ୍ରେଣୀ
,
ବ୍ଳକ
group 1 (alkali metals)
,
s-block
ପର୍ଯ୍ୟାୟ
period 4
ମୌଳିକ ପ୍ରକାର
alkali metal
ମାନକ ପରମାଣବିକ ଓଜନ
(±)
(
A
r
)
39.0983(1)
ଇଲେକ୍ଟ୍ରୋନ୍ ବିନ୍ୟାସ
[
Ar
] 4s
1
per shell
2, 8, 8, 1
ଭୌତିକ ଗୁଣ
ଅବସ୍ଥା
solid
ଗଳନାଙ୍କ
336.53
K
(63.38 °C, 146.08 °F)
ସ୍ଫୁଟନାଙ୍କ
1032 K (759 °C, 1398 °F)
Density
near
r.t.
0.862 g/cm
3
when liquid, at
m.p.
0.828 g/cm
3
Triple point
336.35 K, kPa
Heat of fusion
2.33
kJ/mol
Heat of
76.9 kJ/mol
Molar heat capacity
29.6 J/(mol·K)
Atomic properties
Oxidation states
1
strongly
basic
oxide
Electronegativity
Pauling scale: 0.82
energies
(
more
)
Atomic radius
empirical:
227
pm
Covalent radius
203±12
pm
Van der Waals radius
275
pm
Miscellanea
Crystal structure
body-centered cubic
(bcc)
Speed of sound
thin rod
2000 m/s (at 20 °C)
Thermal expansion
83.3 µm/(m·K) (at 25 °C)
Thermal conductivity
102.5 W/(m·K)
Electrical resistivity
72 n Ω·m (at 20 °C)
Magnetic ordering
paramagnetic
Young's modulus
3.53 GPa
Shear modulus
1.3 GPa
Bulk modulus
3.1 GPa
Mohs hardness
0.4
Brinell hardness
0.363 MPa
CAS Number
7440-09-7
ଇତିହାସ
ଆବିଷ୍କାର
Humphry Davy
(1807)
First isolation
Humphry Davy
(1807)
Most stable
isotopes of potassium
iso
NA
half-life
DM
DE
(
MeV
)
DP
39
K
93.26%
39
K is
stable
with 20
neutrons
40
K
0.012%
1.248(3)×10
9
y
β
−
1.311
40
Ca
ε
1.505
40
Ar
β
+
1.505
40
Ar
41
K
6.73%
41
K is
stable
with 22
neutrons
view
talk
edit
|
references
References
These references will appear in the article, but this list appears only on this page.