Prazeodim
59
Pr
Guruh
Nomaʼlum
Davr
6
Block
f
Protonlar
Elektronlar
Neytronlar
59
59
82
General Properties
Atom raqami
59
Atom massasi
140,90765
Mass Number
141
Turkum
Lantanoidlar
Ranggi
Silver
Radioaktivlik
Yoʻq
From the Greek word prasios, green, and didymos, twin
Crystal Structure
Simple Hexagonal
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.
Electrons per shell
2, 8, 18, 21, 8, 2
Elektron konfiguratsiyasi
[Xe] 4f3 6s2
Praseodymium is usually stored under a light mineral oil or sealed in glass
Physical Properties
Phase
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
Heat of Fusion
6,9 kJ/mol
Heat of Vaporization
330 kJ/mol
Solishtirma issiqlik sigʻimi
0,193 J/g·K
Abundance in Earth's crust
0,00086%
Abundance in Universe
2×10-7%
CAS Number
7440-10-0
PubChem CID Number
23942
Atomic Properties
Atom radiusi
182 pm
Kovalentlik radiusi
203 pm
Elektrmanfiylik
1,13 (Poling boʻyicha)
Ionization Potential
5,473 eV
Molyar hajm
20,8 cm3/mol
Issiqlik oʻtkazuvchanlik
0,125 W/cm·K
Oksidlanish darajasi
2, 3, 4
Applications
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