Periodic Table Home

About the Periodic Table Of Elements

Site Map

Periodic Table Directory



Ta - Tantalum

Tantalum is a hard metal. The 'element' columbium was discovered in columbite minerals from Connecticut by Charles Hatchett in 1801. Tantalum oxide was isolated by Anders G. Ekeberg in 1802 who then named the element because it tantalized his efforts to purify the metal. The pure metal was finally obtained, electrochemically, by Bolton in 1905.

Atomic number - 73 Density g/mL 16 .6
Atomic weight u 180 .9479 Melting point K 3287
Bonding radius A 1 .34 Boiling point K 5731
Atomic radius A 2 .09 Heat of vaporization kJ/mol 743
Ionization Potential V 7 .89 Heat of fusion kJ/mol 31 .6
Electronegativity - 1 .5 Specific heat J/gK 0 .14
The oxide is mildly acidic.
Crystal are body centered cubic.

Electron config. : [Xe] 4f14 5d3 6s2


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

The Clickable Periodic Table      2001 - 2008 by

We need your help! 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="">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!

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.