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Yttrium
Yttrium
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Yttrium metal

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1 Tabel périodik
1.1 Symbol
Y
1.2 Panggil Group
Tennessine metal
⊕
â–¶
â–¼
3
Rank: 15 (Overall)â–¶
â–²
Gadolinium metal
⊕
â–¶
◀ ▶ ADD ⊕
1.3 Panggil periode
uranium metal
⊕
â–¶
â–¼
5
Rank: 3 (Overall)â–¶
â–²
lithium metal
⊕
â–¶
◀ ▶ ADD ⊕
1.4 Block
d block
1.5 Family unsur
transisi Metal
1.6 CAS Number
Roentgenium met..
⊕
â–¶
â–¼
7440655
Rank: 25 (Overall)â–¶
â–²
Aluminium metal
⊕
â–¶
◀ ▶ ADD ⊕
1.7 Jeneng papan Group
P63 / mmc
1.8 Space Group Number
sodium metal
⊕
â–¶
â–¼
194.00
Rank: 5 (Overall)â–¶
â–²
plutonium metal
⊕
â–¶
◀ ▶ ADD ⊕
2 facts
2.1 Facts Interesting
  • Yttrium Metal punika Highly beracun.
  • Yttrium Metal punika reaktif ing alam Empu ora ketemu gratis ing alam.
2.2 sumber
Found in Minerals, Mining, Ores saka Minerals
2.3 History
2.3.1 sing katutup
Johan Gadolin
2.3.2 Discovery
ing taun 1794
2.4 turah mbrawah
2.4.1 Turah mbrawah Ing Universe
Iron metal
⊕
â–¶
â–¼
7 * 10-7 %
Rank: 17 (Overall)â–¶
â–²
Thallium metal
⊕
â–¶
◀ ▶ ADD ⊕
2.4.2 Turah mbrawah Ing Sun
Iron metal
⊕
â–¶
â–¼
~0.0000001 %
Rank: 26 (Overall)â–¶
â–²
Beryllium metal
⊕
â–¶
◀ ▶ ADD ⊕
2.4.3 Turah mbrawah Ing meteorit
Iron metal
⊕
â–¶
â–¼
0.00 %
Rank: 21 (Overall)â–¶
â–²
Gold metal
⊕
â–¶
◀ ▶ ADD ⊕
2.4.4 Turah mbrawah Ing bumi lemah ndhuwur
Aluminium metal
⊕
â–¶
â–¼
0.00 %
Rank: 22 (Overall)â–¶
â–²
Radium metal
⊕
â–¶
◀ ▶ ADD ⊕
2.4.5 Turah mbrawah Ing Segara
sodium metal
⊕
â–¶
â–¼
0.00 %
Rank: 25 (Overall)â–¶
â–²
Protaktinium metal
⊕
â–¶
◀ ▶ ADD ⊕
2.4.6 Turah mbrawah Ing Manungsa
calcium metal
⊕
â–¶
â–¼
ora Sumadhiya
Rank: N/A (Overall)â–¶
â–²
Radium metal
⊕
â–¶
◀ ▶ ADD ⊕
3 ulah
3.1 Ulah lan Wuku
  • metal Yttrium digunakake ing wesi beda, minangka mundhak kekuatan aluminium Magnesium. Kang digunakake kanggo Filter Radar gelombang mikro.
  • Sampeyan uga dipigunakaké minangka katalis ing ethene polymerisation.
3.1.1 Ulah Industrial
Industry Listrik, Industry Elektronik
3.1.2 Ulah Medical
NA
3.1.3 Ulah liyane
wesi
3.2 Properties biologi
3.2.1 keracunan
Highly Toxic
3.2.2 Saiki ing badan Human
Ya
3.2.3 Sang
sodium metal
⊕
â–¶
â–¼
0.00 Sang / mg dm-3
Rank: 26 (Overall)â–¶
â–²
plutonium metal
⊕
â–¶
◀ ▶ ADD ⊕
3.2.4 ing Bone
calcium metal
⊕
â–¶
â–¼
0.07 ppm
Rank: 25 (Overall)â–¶
â–²
plutonium metal
⊕
â–¶
◀ ▶ ADD ⊕
4 fisik
4.1 leleh Point
tungsten metal
⊕
â–¶
â–¼
1,523.00 ° C
Rank: 27 (Overall)â–¶
â–²
Francium metal
⊕
â–¶
◀ ▶ ADD ⊕
4.2 Boiling Point
tungsten metal
⊕
â–¶
â–¼
3,337.00 ° C
Rank: 21 (Overall)â–¶
â–²
Flerovium metal
⊕
â–¶
◀ ▶ ADD ⊕
4.3 katon
4.3.1 State fisik
Solid
4.3.2 warna
perak Putih
4.3.3 luster
NA
4.4 atose
4.4.1 Mohs atose
krom metal
⊕
â–¶
â–¼
ora Sumadhiya
Rank: N/A (Overall)â–¶
â–²
sesium metal
⊕
â–¶
◀ ▶ ADD ⊕
4.4.2 Brinell atose
osmium metal
⊕
â–¶
â–¼
589.00 MPa
Rank: 22 (Overall)â–¶
â–²
sesium metal
⊕
â–¶
◀ ▶ ADD ⊕
4.4.3 Vickers atose
tungsten metal
⊕
â–¶
â–¼
ora Sumadhiya
Rank: N/A (Overall)â–¶
â–²
Palladium metal
⊕
â–¶
◀ ▶ ADD ⊕
4.5 Kacepetan swara
technetium metal
⊕
â–¶
â–¼
3,300.00 m / s
Rank: 23 (Overall)â–¶
â–²
Thallium metal
⊕
â–¶
◀ ▶ ADD ⊕
4.6 Properties Optical
4.6.1 bias Index
Palladium metal
⊕
â–¶
â–¼
ora Sumadhiya
Rank: N/A (Overall)â–¶
â–²
Mercury metal
⊕
â–¶
◀ ▶ ADD ⊕
4.6.2 reflectivity
Silver metal
⊕
â–¶
â–¼
ora Sumadhiya
Rank: N/A (Overall)â–¶
â–²
molybdenum metal
⊕
â–¶
◀ ▶ ADD ⊕
4.7 allotropes
Ora
4.7.1 α allotropes
ora Sumadhiya
4.7.2 β allotropes
ora Sumadhiya
4.7.3 γ allotropes
ora Sumadhiya
5 Kimia
5.1 Formula Kimia
Y
5.2 isotop
5.2.1 Isotop dikenal
Palladium metal
⊕
â–¶
â–¼
19
Rank: 20 (Overall)â–¶
â–²
Tennessine metal
⊕
â–¶
◀ ▶ ADD ⊕
5.3 keelektronegatifan
5.3.1 Pauling Elektronegativitas
Gold metal
⊕
â–¶
â–¼
1.22
Rank: 38 (Overall)â–¶
â–²
Francium metal
⊕
â–¶
◀ ▶ ADD ⊕
5.3.2 Sanderson Elektronegativitas
kobalt metal
⊕
â–¶
â–¼
0.65
Rank: 29 (Overall)â–¶
â–²
sesium metal
⊕
â–¶
◀ ▶ ADD ⊕
5.3.3 Allred Rochow Elektronegativitas
Panerapan metal
⊕
â–¶
â–¼
1.11
Rank: 29 (Overall)â–¶
â–²
sesium metal
⊕
â–¶
◀ ▶ ADD ⊕
5.3.4 Mulliken-Jaffe Elektronegativitas
polonium metal
⊕
â–¶
â–¼
ora Sumadhiya
Rank: N/A (Overall)â–¶
â–²
sesium metal
⊕
â–¶
◀ ▶ ADD ⊕
5.3.5 Allen Elektronegativitas
berkelium metal
⊕
â–¶
â–¼
1.12
Rank: 38 (Overall)â–¶
â–²
sesium metal
⊕
â–¶
◀ ▶ ADD ⊕
5.4 Electropositivity
5.4.1 Pauling Electropositivity
Francium metal
⊕
â–¶
â–¼
2.78
Rank: 16 (Overall)â–¶
â–²
Gold metal
⊕
â–¶
◀ ▶ ADD ⊕
5.5 tenogo ionisasi
5.5.1 Level Energy 1st
krom metal
⊕
â–¶
â–¼
600.00 kJ / mol
Rank: 53 (Overall)â–¶
â–²
sesium metal
⊕
â–¶
◀ ▶ ADD ⊕
5.5.2 Level Energy 2
krom metal
⊕
â–¶
â–¼
1,180.00 kJ / mol
Rank: 63 (Overall)â–¶
â–²
uranium metal
⊕
â–¶
◀ ▶ ADD ⊕
5.5.3 Level Energy 3rd
krom metal
⊕
â–¶
â–¼
1,980.00 kJ / mol
Rank: 76 (Overall)â–¶
â–²
osmium metal
⊕
â–¶
◀ ▶ ADD ⊕
5.5.4 Level Energy 4
krom metal
⊕
â–¶
â–¼
5,847.00 kJ / mol
Rank: 10 (Overall)â–¶
â–²
thorium metal
⊕
â–¶
◀ ▶ ADD ⊕
5.5.5 Level Energy 5th
krom metal
⊕
â–¶
â–¼
7,430.00 kJ / mol
Rank: 14 (Overall)â–¶
â–²
dubnium metal
⊕
â–¶
◀ ▶ ADD ⊕
5.5.6 Level Energy 6th
krom metal
⊕
â–¶
â–¼
8,970.00 kJ / mol
Rank: 17 (Overall)â–¶
â–²
Seaborgium metal
⊕
â–¶
◀ ▶ ADD ⊕
5.5.7 tingkat Energy 7
krom metal
⊕
â–¶
â–¼
11,190.00 kJ / mol
Rank: 18 (Overall)â–¶
â–²
Bohrium metal
⊕
â–¶
◀ ▶ ADD ⊕
5.5.8 Level Energy 8
krom metal
⊕
â–¶
â–¼
12,450.00 kJ / mol
Rank: 18 (Overall)â–¶
â–²
hassium metal
⊕
â–¶
◀ ▶ ADD ⊕
5.5.9 Level Energy 9
krom metal
⊕
â–¶
â–¼
14,110.00 kJ / mol
Rank: 19 (Overall)â–¶
â–²
Yttrium metal
⊕
â–¶
◀ ▶ ADD ⊕
5.5.10 Level Energy 10th
krom metal
⊕
â–¶
â–¼
18,400.00 kJ / mol
Rank: 17 (Overall)â–¶
â–²
strontium metal
⊕
â–¶
◀ ▶ ADD ⊕
5.5.11 Level Energy 11
Magnesium metal
⊕
â–¶
â–¼
19,900.00 kJ / mol
Rank: 18 (Overall)â–¶
â–²
Yttrium metal
⊕
â–¶
◀ ▶ ADD ⊕
5.5.12 Level Energy 12
Magnesium metal
⊕
â–¶
â–¼
36,090.00 kJ / mol
Rank: 5 (Overall)â–¶
â–²
molybdenum metal
⊕
â–¶
◀ ▶ ADD ⊕
5.5.13 Level Energy 13
titanium metal
⊕
â–¶
â–¼
ora Sumadhiya
Rank: N/A (Overall)â–¶
â–²
molybdenum metal
⊕
â–¶
◀ ▶ ADD ⊕
5.5.14 Level Energy 14
vanadium metal
⊕
â–¶
â–¼
ora Sumadhiya
Rank: N/A (Overall)â–¶
â–²
molybdenum metal
⊕
â–¶
◀ ▶ ADD ⊕
5.5.15 Level Energy 15
krom metal
⊕
â–¶
â–¼
ora Sumadhiya
Rank: N/A (Overall)â–¶
â–²
Manganese metal
⊕
â–¶
◀ ▶ ADD ⊕
5.5.16 Level Energy 16
Manganese metal
⊕
â–¶
â–¼
ora Sumadhiya
Rank: N/A (Overall)â–¶
â–²
Iron metal
⊕
â–¶
◀ ▶ ADD ⊕
5.5.17 Level Energy 17
Iron metal
⊕
â–¶
â–¼
ora Sumadhiya
Rank: N/A (Overall)â–¶
â–²
kobalt metal
⊕
â–¶
◀ ▶ ADD ⊕
5.5.18 Level Energy 18
kobalt metal
⊕
â–¶
â–¼
ora Sumadhiya
Rank: N/A (Overall)â–¶
â–²
Nickel metal
⊕
â–¶
◀ ▶ ADD ⊕
5.5.19 Level Energy 19
Nickel metal
⊕
â–¶
â–¼
ora Sumadhiya
Rank: N/A (Overall)â–¶
â–²
tembaga metal
⊕
â–¶
◀ ▶ ADD ⊕
5.5.20 Level Energy 20
seng metal
⊕
â–¶
â–¼
ora Sumadhiya
Rank: N/A (Overall)â–¶
â–²
molybdenum metal
⊕
â–¶
◀ ▶ ADD ⊕
5.5.21 Level Energy 21
seng metal
⊕
â–¶
â–¼
ora Sumadhiya
Rank: N/A (Overall)â–¶
â–²
molybdenum metal
⊕
â–¶
◀ ▶ ADD ⊕
5.5.22 Level Energy 22
tembaga metal
⊕
â–¶
â–¼
ora Sumadhiya
Rank: N/A (Overall)â–¶
â–²
molybdenum metal
⊕
â–¶
◀ ▶ ADD ⊕
5.5.23 Level Energy 23rd
tembaga metal
⊕
â–¶
â–¼
ora Sumadhiya
Rank: N/A (Overall)â–¶
â–²
molybdenum metal
⊕
â–¶
◀ ▶ ADD ⊕
5.5.24 Level Energy 24
Iron metal
⊕
â–¶
â–¼
ora Sumadhiya
Rank: N/A (Overall)â–¶
â–²
molybdenum metal
⊕
â–¶
◀ ▶ ADD ⊕
5.5.25 Level Energy 25th
molybdenum metal
⊕
â–¶
â–¼
ora Sumadhiya
Rank: N/A (Overall)â–¶
â–²
molybdenum metal
⊕
â–¶
5.5.26 Level Energy 26th
molybdenum metal
⊕
â–¶
â–¼
ora Sumadhiya
Rank: N/A (Overall)â–¶
â–²
molybdenum metal
⊕
â–¶
5.5.27 Level Energy 27th
molybdenum metal
⊕
â–¶
â–¼
ora Sumadhiya
Rank: N/A (Overall)â–¶
â–²
molybdenum metal
⊕
â–¶
5.5.28 Level Energy 28th
molybdenum metal
⊕
â–¶
â–¼
ora Sumadhiya
Rank: N/A (Overall)â–¶
â–²
molybdenum metal
⊕
â–¶
5.5.29 Level Energy 29
molybdenum metal
⊕
â–¶
â–¼
ora Sumadhiya
Rank: N/A (Overall)â–¶
â–²
molybdenum metal
⊕
â–¶
5.5.30 Level Energy 30
molybdenum metal
⊕
â–¶
â–¼
ora Sumadhiya
Rank: N/A (Overall)â–¶
â–²
molybdenum metal
⊕
â–¶
5.6 padha karo elektrokimia
Francium metal
⊕
â–¶
â–¼
1.11 g / amp-day
Rank: 56 (Overall)â–¶
â–²
Beryllium metal
⊕
â–¶
◀ ▶ ADD ⊕
5.7 Fungsi Work elektron
Platinum metal
⊕
â–¶
â–¼
3.10 eV
Rank: 35 (Overall)â–¶
â–²
sesium metal
⊕
â–¶
◀ ▶ ADD ⊕
5.8 Properties Kimia liyane
Kimia Stabilitas, kebakar, ionisasi, Isotop radioaktif, kelarutan
6 atom
6.1 Panggil atom
Tennessine metal
⊕
â–¶
â–¼
39
Rank: 73 (Overall)â–¶
â–²
lithium metal
⊕
â–¶
◀ ▶ ADD ⊕
6.2 Konfigurasi elektron
[Kr] 4d 1 5S 2
6.3 Struktur Crystal
Hexagonal Tutup dikempalken (HCP)
6.3.1 Crystal pola
6.4 atom
6.4.1 Jumlah proton
Tennessine metal
⊕
â–¶
â–¼
39
Rank: 72 (Overall)â–¶
â–²
lithium metal
⊕
â–¶
◀ ▶ ADD ⊕
6.4.2 Jumlah Neutron
Flerovium metal
⊕
â–¶
â–¼
50
Rank: 55 (Overall)â–¶
â–²
lithium metal
⊕
â–¶
◀ ▶ ADD ⊕
6.4.3 Jumlah Èlèktron
Tennessine metal
⊕
â–¶
â–¼
39
Rank: 72 (Overall)â–¶
â–²
lithium metal
⊕
â–¶
◀ ▶ ADD ⊕
6.5 Radius saka Atom
6.5.1 Radius atom
sesium metal
⊕
â–¶
â–¼
180.00 pm
Rank: 14 (Overall)â–¶
â–²
Beryllium metal
⊕
â–¶
◀ ▶ ADD ⊕
6.5.2 kovalen Radius
Francium metal
⊕
â–¶
â–¼
190.00 pm
Rank: 18 (Overall)â–¶
â–²
Beryllium metal
⊕
â–¶
◀ ▶ ADD ⊕
6.5.3 Van der Waals Radius
Francium metal
⊕
â–¶
â–¼
200.00 pm
Rank: 28 (Overall)â–¶
â–²
seng metal
⊕
â–¶
◀ ▶ ADD ⊕
6.6 Bobot atom
Tennessine metal
⊕
â–¶
â–¼
88.91 Amu
Rank: 67 (Overall)â–¶
â–²
lithium metal
⊕
â–¶
◀ ▶ ADD ⊕
6.7 Volume atom
sesium metal
⊕
â–¶
â–¼
19.80 cm3 / mol
Rank: 21 (Overall)â–¶
â–²
Manganese metal
⊕
â–¶
◀ ▶ ADD ⊕
6.8 Nomer atom jejer
6.8.1 unsur Previous
6.8.2 Sabanjure unsur
6.9 Potensi Valence Electron
Platinum metal
⊕
â–¶
â–¼
48.00 (-eV)
Rank: 30 (Overall)â–¶
â–²
Francium metal
⊕
â–¶
◀ ▶ ADD ⊕
6.10 Constant pola
Manganese metal
⊕
â–¶
â–¼
364.74 pm
Rank: 31 (Overall)â–¶
â–²
Beryllium metal
⊕
â–¶
◀ ▶ ADD ⊕
6.11 pola Angles
π/2, π/2, 2 π/3
6.12 Pola C / A rasio
kadmium metal
⊕
â–¶
â–¼
1.57
Rank: 16 (Overall)â–¶
â–²
Beryllium metal
⊕
â–¶
◀ ▶ ADD ⊕
7 Teknik
7.1 Kapadhetan
7.1.1 Kapadhetan Ing suhu kamar
hassium metal
⊕
â–¶
â–¼
4.47 g / cm 3
Rank: 71 (Overall)â–¶
â–²
lithium metal
⊕
â–¶
◀ ▶ ADD ⊕
7.1.2 Kapadhetan Nalika Liquid (ing mp)
osmium metal
⊕
â–¶
â–¼
4.24 g / cm3
Rank: 48 (Overall)â–¶
â–²
lithium metal
⊕
â–¶
◀ ▶ ADD ⊕
7.2 Strength tensile
Iron metal
⊕
â–¶
â–¼
ora Sumadhiya
Rank: N/A (Overall)â–¶
â–²
Indium metal
⊕
â–¶
◀ ▶ ADD ⊕
7.3 viskositas
Mercury metal
⊕
â–¶
â–¼
ora Sumadhiya
Rank: N/A (Overall)â–¶
â–²
Mercury metal
⊕
â–¶
7.4 meksa beluk
7.4.1 Meksa beluk ing 1000 K
strontium metal
⊕
â–¶
â–¼
0.00 (Pa)
Rank: 32 (Overall)â–¶
â–²
cerium metal
⊕
â–¶
◀ ▶ ADD ⊕
7.4.2 Meksa beluk ing 2000 K
krom metal
⊕
â–¶
â–¼
4.27 (Pa)
Rank: 10 (Overall)â–¶
â–²
tungsten metal
⊕
â–¶
◀ ▶ ADD ⊕
7.5 situs kelenturan
7.5.1 nyukur pengaturan
osmium metal
⊕
â–¶
â–¼
25.60 GPA
Rank: 30 (Overall)â–¶
â–²
kalium metal
⊕
â–¶
◀ ▶ ADD ⊕
7.5.2 pengaturan akeh
osmium metal
⊕
â–¶
â–¼
41.20 GPA
Rank: 30 (Overall)â–¶
â–²
sesium metal
⊕
â–¶
◀ ▶ ADD ⊕
7.5.3 Young kang pengaturan
iridium metal
⊕
â–¶
â–¼
63.50 GPA
Rank: 32 (Overall)â–¶
â–²
sesium metal
⊕
â–¶
◀ ▶ ADD ⊕
7.6 Poisson rasio
Panerapan metal
⊕
â–¶
â–¼
0.24
Rank: 26 (Overall)â–¶
â–²
Beryllium metal
⊕
â–¶
◀ ▶ ADD ⊕
7.7 Properties Teknik liyane
ductile
8 Magnetic
8.1 Ciri Magnetic
8.1.1 Gravitasi tartamtu
kobalt metal
⊕
â–¶
â–¼
4.47
Rank: 59 (Overall)â–¶
â–²
lithium metal
⊕
â–¶
◀ ▶ ADD ⊕
8.1.2 Nindakake Magnetic
paramagnetic
8.1.3 permeabilitas
Iron metal
⊕
â–¶
â–¼
ora Sumadhiya
Rank: N/A (Overall)â–¶
â–²
Bismuth metal
⊕
â–¶
◀ ▶ ADD ⊕
8.1.4 kelemahan
Iron metal
⊕
â–¶
â–¼
ora Sumadhiya
Rank: N/A (Overall)â–¶
â–²
Bismuth metal
⊕
â–¶
◀ ▶ ADD ⊕
8.2 Properties Listrik
8.2.1 Property Listrik
Arman
8.2.2 resistivity
Mercury metal
⊕
â–¶
â–¼
596.00 nΩ · m
Rank: 8 (Overall)â–¶
â–²
Thallium metal
⊕
â–¶
◀ ▶ ADD ⊕
8.2.3 konduktivitas listrik
Silver metal
⊕
â–¶
â–¼
0.02 10 6 / cm Ω
Rank: 47 (Overall)â–¶
â–²
plutonium metal
⊕
â–¶
◀ ▶ ADD ⊕
8.2.4 elektron Affinity
Gold metal
⊕
â–¶
â–¼
29.60 kJ / mol
Rank: 30 (Overall)â–¶
â–²
Mercury metal
⊕
â–¶
◀ ▶ ADD ⊕
9 termal
9.1 Kalor tartamtu
lithium metal
⊕
â–¶
â–¼
0.30 J / (kg K)
Rank: 18 (Overall)â–¶
â–²
americium metal
⊕
â–¶
◀ ▶ ADD ⊕
9.2 Graham Kapasitas kalor
americium metal
⊕
â–¶
â–¼
26.53 J / mol · K
Rank: 27 (Overall)â–¶
â–²
Beryllium metal
⊕
â–¶
◀ ▶ ADD ⊕
9.3 doyo termal
Silver metal
⊕
â–¶
â–¼
17.20 W / m · K
Rank: 48 (Overall)â–¶
â–²
neptunium metal
⊕
â–¶
◀ ▶ ADD ⊕
9.4 suhu kritis
lithium metal
⊕
â–¶
â–¼
ora Sumadhiya
Rank: N/A (Overall)â–¶
â–²
ytterbium metal
⊕
â–¶
◀ ▶ ADD ⊕
9.5 Expansion termal
sesium metal
⊕
â–¶
â–¼
10.60 μm / (m · K)
Rank: 37 (Overall)â–¶
â–²
tungsten metal
⊕
â–¶
◀ ▶ ADD ⊕
9.6 enthalpy
9.6.1 Enthalpy panguapan
tungsten metal
⊕
â–¶
â–¼
393.00 kJ / mol
Rank: 18 (Overall)â–¶
â–²
seng metal
⊕
â–¶
◀ ▶ ADD ⊕
9.6.2 Enthalpy saka Fusion
tungsten metal
⊕
â–¶
â–¼
17.15 kJ / mol
Rank: 16 (Overall)â–¶
â–²
sesium metal
⊕
â–¶
◀ ▶ ADD ⊕
9.6.3 Enthalpy saka atomization
tungsten metal
⊕
â–¶
â–¼
418.00 kJ / mol
Rank: 18 (Overall)â–¶
â–²
Mercury metal
⊕
â–¶
◀ ▶ ADD ⊕
9.7 Standard molar Entropy
Protaktinium me..
⊕
â–¶
â–¼
44.40 J / mol.K
Rank: 33 (Overall)â–¶
â–²
Beryllium metal
⊕
â–¶
◀ ▶ ADD ⊕
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