Ta - Tantalum - periodic table of the elements

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 configuration: [Xe] 4f¹⁴ 5d³ 6s²

Other elements of the periodic table

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