पलाडियम
46
Pd
समूह
10
आवर्त
5
ब्लॉक
d
प्रोटॉन
इलेक्ट्रॉन्स
न्यूट्रॉन
46
46
60
सामान्य गुण
परमाणु संख्या
46
परमाणु भार
106.42
द्रव्यमान संख्या
106
श्रेणी
संक्रमण धातु
रंग
रजत
रेडियोधर्मी
नहीं
Palladium was named after the asteroid Pallas; Pallas was the Greek goddess of wisdom
क्रिस्टल की संरचना
चेहरा केंद्रित घन
इतिहास
Palladium was discovered in 1803, in London, by English chemist William Hyde Wollaston.
He examined the residues left from platinum after dissolving it in aqua regia, a concentrated solution of hydrochloric and nitric acids.
He then isolated palladium in a series of chemical reactions.
He examined the residues left from platinum after dissolving it in aqua regia, a concentrated solution of hydrochloric and nitric acids.
He then isolated palladium in a series of chemical reactions.
इलेक्ट्रॉन प्रति शेल
2, 8, 18, 18
इलेक्ट्रॉन कॉन्फिगरेशन
[Kr] 4d10
In the late 1800s, palladium was more expensive than platinum
भौतिक गुण
अवस्था
ठोस
घनत्व
12.02 g/cm3
गलनांक
1828.05 K | 1554.9 °C | 2830.82 °F
क्वथनांक
3236.15 K | 2963 °C | 5365.4 °F
विलय ऊष्मा
16.7 कि.जूल/मोल
वाष्पीकरण ऊष्मा
380 कि.जूल/मोल
विशिष्ट ऊष्मा क्षमता
0.244 जूल/ग्राम•केल्विन
पृथ्वी की पपड़ी में प्रचुरता
6.3×10-7%
ब्रह्मांड में प्रचुरता
2×10-7%
सी ए एस संख्या
7440-05-3
PubChem सी.आई.डी. संख्या
23938
परमाण्विक गुण
परमाणु का त्रिज्या
137 pm
संयोजी त्रिज्या
139 pm
इलेक्ट्रोनेगेटिविटी
2.2 (पाइलिंग पैमाना)
आयनीकरण ऊर्जाएं
8.3369 eV
परमाणु आयतन
8.9 से.मी.३/मोल
तापीय चालकता
0.718 W/cm·K
ऑक्सीकरण स्थितियां
2, 4
उपयोग
The largest use of palladium is in catalytic converters in the automobile industry.
Finely divided palladium is a good catalyst and is used for hydrogenation and dehydrogenation reactions.
The metal is used in dentistry, watch making, and in making surgical instruments and electrical contacts.
Finely divided palladium is a good catalyst and is used for hydrogenation and dehydrogenation reactions.
The metal is used in dentistry, watch making, and in making surgical instruments and electrical contacts.
Palladium is considered to be of low toxicity
समस्थानिक
स्थिर आइसोटोप
102Pd, 104Pd, 105Pd, 106Pd, 108Pd, 110Pdअस्थिर समस्थानिक
91Pd, 92Pd, 93Pd, 94Pd, 95Pd, 96Pd, 97Pd, 98Pd, 99Pd, 100Pd, 101Pd, 103Pd, 107Pd, 109Pd, 111Pd, 112Pd, 113Pd, 114Pd, 115Pd, 116Pd, 117Pd, 118Pd, 119Pd, 120Pd, 121Pd, 122Pd, 123Pd, 124Pd