Periodic Table Home

About the Periodic Table Of Elements

Site Map

Periodic Table Directory

 

Pr - Praseodymium

Baron von Welsbach separated the components of dydimium into neodumium (the new twin) and praseodymium (the green twin) in 1885 in Vienna. Praseodymium is a component of our glass blowing specticles.

Atomic number - 59 Density g/mL 6 .77
Atomic weight u 140 .9077 Melting point K 1204
Bonding radius A 1 .65 Boiling point K 3785
Atomic radius A 2 .67 Heat of vaporization kJ/mol 296 .8
Ionization Potential V 5 .46 Heat of fusion kJ/mol 6 .89
Electronegativity - 1 .13 Specific heat J/gK 0 .19
The oxide is mildly basic.
Crystal are hexagonal.

Electron config. : [Xe] 4f3 6s2

Top | About | Search | Comment | PC Chemistry

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18

H He
Li Be B C N O F Ne
Na Mg Al Si P S Cl Ar
K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr
Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe
Cs Ba La* Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn
Fr Ra Ac** Rf Db Sg Bh Hs Mt 110 111 112 113
Lanthanides* Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu
Actinides ** Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr

Isotopes of Pr: Click mass number for decay process, product for element page.
121
1.4 sec
EC,7.900 MeV
Ce-121
120.95400
124
1.2 sec
EC/ECp,11.700
Ce-124/La-123
123.94310
126
3.1 sec
EC/ECp,10.400
Ce-126/La-125
125.93526
127
4.9 sec
EC,7.500 MeV
Ce-127
126.93086
128
3.1 sec
EC/ECp,9.300
Ce-128/La-127
127.92882
129
30 sec
EC,6.300 MeV
Ce-129
128.92485
130
40.0 sec
EC,8.100 MeV
Ce-130
129.92334
131
1.53 min
EC,5.250 MeV
Ce-131
130.92002
132
1.6 min
EC,7.100 MeV
Ce-132
131.91911
133
6.5 min
EC,4.300 MeV
Ce-133
132.91619
134
17 min
EC,6.200 MeV
Ce-134
133.91569
135
24 min
EC,3.720 MeV
Ce-135
134.91313
136
13.1 min
EC,5.126 MeV
Ce-136
135.91264
137
1.28 hr
EC,2.702 MeV
Ce-137
136.91068
138
1.45 min
EC,4.437 MeV
Ce-138
137.91074
139
4.41 hr
EC,2.129 MeV
Ce-139
138.90893
140
3.39 min
EC,3.388 MeV
Ce-140
139.90907
141 100%

Stable

140.90764
142
19.12 hr
B-/EC,2.162
Nd-142/Ce-142
141.91004
143
13.57 da
B-,1.462 MeV
Nd-143
142.91081
144
17.28 min
B-,2.997 MeV
Nd-144
143.91330
145
5.984 hr
B-,1.805 MeV
Nd-145
144.91450
146
24.15 min
B-,4.200 MeV
Nd-146
145.91761
147
13.4 min
B-,2.690 MeV
Nd-147
146.91897
148
2.27 min
B-,4.930 MeV
Nd-148
147.92217
149
2.26 min
B-,3.397 MeV
Nd-149
148.92379
150
6.19 sec
B-,5.690 MeV
Nd-150
149.92699
151
18.90 sec
B-,4.100 MeV
Nd-151
150.92822
152
3.63 sec
B-,6.400 MeV
Nd-152
151.93161
153
4.3 sec
B-,5.500 MeV
Nd-153
152.93397
154
2.3 sec
B-,7.900 MeV
Nd-154
153.93805
MASS abund.
Halflife
Particle, Energy
Decay Product(s)
Isotopic Mass

Updated by clh on 2/6/98. This is not a publication of Phoenix College.

The Clickable Periodic Table     © 2001 - 2008 by ePeriodicTable.com

We need your help! ePeriodicTable.com was designed to be a free resource meant to promote the understanding of chemistry, and be a useful reference tool for researchers, students and scientists around the world. We do not charge for anything on this website, but you can support us tremendously by putting a link on your website to us. You can copy and paste this code for a link to us:   <a href="http://www.eperiodictable.com">periodic table</a>

We are very grateful for your support!


Authoritative Internet Resources:

A wholesale distributor of unique and natural wholesale products and health products, like a liquid vitamins natural nutritional supplements, in addition to natural weight loss pills and a laundry detergent laundry balls alternative. Try this very effective stop smoking and quit smoking product, along with smoke away and other health products right now. If you need natural weight loss pills, natural diet pills that contain hoodia gordonii, specialty diet products, or even information about cortisol based weight loss products and nutritional supplements, and info on wholesale nutritional supplements they have the information you need.

Get free quit smoking information and learn about products like nicotine gum and nicotine patch. Enjoy liquid supplements and vitamins and the popular liquid multi vitamin. Visit a distributor of a laundry ball used as a detergent replacement. You can get stop smoking information as well as information regarding all natural weight loss pills. Get specialized cortisol info on weight loss products like cortislim and relacore and laundry services.

You can enjoy addicting online games and you can play free games at the ultimate gaming arcade site for addicting games on the entire web. For the tax season, compare tax software programs. Thank you very much for visiting ePeriodicTable.com!

The information herein is available for educational purposes only. We are not liable for misuse or misapplication of any information herein, nor for any inaccuracies.