Prazeodim
59
Pr
Guruh
Nomaʼlum
Davr
6
Blok
f
Protonlar
Elektronlar
Neytronlar
59
59
82
Umumiy xususiyatlar
Atom raqami
59
Atom massasi
140,90765
Mass raqami
141
Turkum
Lantanoidlar
Ranggi
Kumush
Radioaktivlik
Yoʻq
From the Greek word prasios, green, and didymos, twin
Kristall tuzilma
Oddiy olti burchakli
Tarix
Praseodymium was first identified in 1885, in Vienna, by the Austrian chemist Carl Auer von Welsbach.
It was discovered in didymium, a substance incorrectly said by Carl Gustav Mosander to be a new element in 1841.
Pure metallic praseodymium was first produced in 1931.
It was discovered in didymium, a substance incorrectly said by Carl Gustav Mosander to be a new element in 1841.
Pure metallic praseodymium was first produced in 1931.
Qobiqdagi elektronlar soni
2, 8, 18, 21, 8, 2
Elektron konfiguratsiyasi
[Xe] 4f3 6s2
Praseodymium is usually stored under a light mineral oil or sealed in glass
Jismoniy xususiyatlar
Faza
Qattiq modda
Zichlik
6,773 g/cm3
Erish harorati
1208,15 K | 935 °C | 1715 °F
Qaynash harorati
3793,15 K | 3520 °C | 6368 °F
Eritish issiqligi
6,9 kJ/mol
Bugʻlanish issiqligi
330 kJ/mol
Solishtirma issiqlik sigʻimi
0,193 J/g·K
Yer po‘stidagi miqdori
0,00086%
Olamdagi miqdori
2×10-7%
CAS raqami
7440-10-0
PubChem CID raqami
23942
Atom xususiyatlari
Atom radiusi
182 pm
Kovalentlik radiusi
203 pm
Elektrmanfiylik
1,13 (Poling boʻyicha)
Ionlashish potensiali
5,473 eV
Molyar hajm
20,8 cm3/mol
Issiqlik oʻtkazuvchanlik
0,125 W/cm·K
Oksidlanish darajasi
2, 3, 4
Qo‘llanilish sohalari
Praseodymium is used as an alloying agent with magnesium to create high-strength metals that are used in aircraft engines.
Misch metal, used in making cigarette lighters, contains about 5% praseodymium metal.
Praseodymium is used to make specialized yellow glass goggles for glass blowers and welders.
Misch metal, used in making cigarette lighters, contains about 5% praseodymium metal.
Praseodymium is used to make specialized yellow glass goggles for glass blowers and welders.
Praseodymium is considered to be moderately toxic
Izotoplar
Barqaror izotoplar
141PrBeqaror izotoplar
121Pr, 122Pr, 123Pr, 124Pr, 125Pr, 126Pr, 127Pr, 128Pr, 129Pr, 130Pr, 131Pr, 132Pr, 133Pr, 134Pr, 135Pr, 136Pr, 137Pr, 138Pr, 139Pr, 140Pr, 142Pr, 143Pr, 144Pr, 145Pr, 146Pr, 147Pr, 148Pr, 149Pr, 150Pr, 151Pr, 152Pr, 153Pr, 154Pr, 155Pr, 156Pr, 157Pr, 158Pr, 159Pr