कोबाल्ट  हिन्दी देवनागरी में पढ़ें।

kobalt
kathor chamakadar sileti dhatu
sadharan gunadharm
nam, pratik, snkhya kobalt, Co, 27
tatv shreni snkraman dhatu
samooh, avart, kaksha 9, 4, d
manak paramanu bhar 58.933195g·mol−1
ilektraaun vinyas 1s2 2s2 2p6 3s2 3p6 4s2 3d7
ilektraaun prati shel 2, 8, 15, 2
bhautik gunadharm
rng dhatumay sileti
ghanatv (nikat k.ta.) 8.90 g·cm−3
taral ghanatv
(galanank par)
7.75 g·cm−3
galanank 1768 K, 1495 °C, 2723 °F
kvathanank 3200 K, 2927 °C, 5301 °F
snlayan ooshma 16.06 kilo jool-mol
vashpan ooshma 377 kilo jool-mol
vishisht ooshmiy
kshamata
24.81

jool-mol−1kilo−1

vashp dab
P (Pa) 1 10 100 1 k 10 k 100 k
at T (K) 1790 1960 2165 2423 2755 3198
paramanvik gunadharm
aauksikaran avastha 5, 4 , 3, 2, 1, -1
(ubhayadharmi aauksaid)
ilektronegetiviti 1.88 (pailing paimana)
ayanikaran oorjaen
(adhik)
1st: 760.4 ki.jool•mol−1
2nd: 1648 ki.jool•mol−1
3rd: 3232 ki.jool•mol−1
paramanvik trijya 125 pm
sahasnyojak trijya 126±3 (low spin), 150±7 (high spin) pm
vividh gunadharm
kristal snrachana shatkon
chumbakiy kram lohachumbakiy
vaidyut pratirodhakata (20 °C) 62.4 nΩ·m
ooshmiy chalakata (300 K) 100 W·m−1·K−1
ooshmiy prasar (25 °C) 13.0 µm·m−1·K−1
dhvani chal (patali chhad men) (20 °C) 4720 m.s-1
yng mapank 209 GPa
aparoopan mapank 75 GPa
sthool mapank 180 GPa
paauyazan anupat 0.31
mohs kathorata mapank 5.0
vikars kathorata 1043 MPa
brainal kathorata 700 MPa
si.e.es pnjikaran
snkhya
7440-48-4
samasthanik
samasthanik pra. prachurata arddh ayu ksharan avastha ksharan oorja
(MeV)
ksharan utpad
56Co syn 77.27 d ε 4.566 56Fe
57Co syn 271.79 d ε 0.836 57Fe
58Co syn 70.86 d ε 2.307 58Fe
59Co 100% 59Co 32 nyootraaun ke sath sthir
60Co syn 5.2714 y β, γ, γ 2.824 60Ni

kobalt (angrezi:cobalt) ek rasayanik tatv hai. kobalt ka snket Co, paramanu snkhya 27, paramanu bhar 59.94 hai. prachin kal ke rngin kanch ke vishleshan se pata lagata hai ki kobalt ke khanij ka upayog tab gyat tha. aigrikola ne 1530 ee. men kuchh khanijon aur ayaskon ke lie kobalt shabd ka prayog kiya tha. 1742 ee. men brant ne pahale pahal ashuddh roop men is dhatu ko prapt kiya tha. unhonne isake chunbakiy gun aur oonche dravanank ka bhi pata lagaya tha. kuchh khanijon ke pighalane se nile rng ke banane ka karan yahi tatv tha. is dhatu ka prarnbhik adhyayan bairgamain ne kiya. kobalt any dhatuon ke khanijon, visheshat: lohe aur sise ke khanijon ke sath mila hua paya jata hai.

khanijon se dhatu prapt karane ki vidhi khanijon ki prakriti aur unamen upasthit dhatuon par nirbhar karati hai. dhatu karm vastut: kuchh pechida hota hai. is khanij ko dalakar bhatthiyon men bhoonate hain. isase vashpashil ansh bahut kuchh nikal jata hai. phir namak ke sath uttapt karate hain, jisase chandi aviley silvar kloraid men parinat ho jati hain. jalaviley nishkarsh men kobalt ke atirikt nikal aur tanba rahate hain. lauh dhatu ke upachar se tanbe ko avakshipt karake alag kar lete hain. avashesh ko ab haidroklorik aml men ghulate hain. vilayan ko choona patthar se udasin banakar, lohe ko haidramksaid ke roop men avakshipt kar lete hain. nisynd ko ab birnjak choone ke upachar se kobalt ka kale kobalt haidraauksaid ke roop men avakshep nikal jata hai aur nikal vilayan men rah jata hai.


panne ki pragati avastha
adhar
prarambhik
madhyamik
poornata
shodh

tika tippani aur sndarbh

bahari kadiyan

snbndhit lekh

varnamala kramanusar lekh khoj

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