Ba - Barium

An alkaline earth element, barium is also a toxic heavy metal. Minerals containing barium were identified by Karl Scheele in 1774 from which the pure metal was electrolysed by Humphrey Davy in 1808.

Atomic number - 56 Density g/mL 3 .5

Atomic weight u 137 .33 Melting point K 1002

Bonding radius A 1 .98 Boiling point K 2171

Atomic radius A 2 .78 Heat of vaporization kJ/mol 142

Ionization Potential V 5 .212 Heat of fusion kJ/mol 7 .75

Electronegativity - 0 .89 Specific heat J/gK 0 .204

The oxide is a strong base.
Crystal are body centered cubic.

Electron config. : [Xe] 6s²

Isotopes of Ba: Click mass number for decay process, product for element page.

114 0.43 sec a/EC,8.900 Xe-110/Cs-114 113.95093	115 0.4 sec EC,5.800 MeV Cs-115 114.94771	116 1.35 sec EC,6.700 MeV Cs-116 115.94170	117 1.75 sec EC/ECa/ECp,9.500 Cs-117/I-113/Xe-116 116.93880	118 5.2 sec EC,11.080 MeV Cs-118 117.93344	119 5.4 sec EC/ECp,8.100 Cs-119/Xe-118 118.93107	120 32 sec EC,5.000 MeV Cs-120 119.92603
121 29.5 sec EC/ECp,6.800 Cs-121/Xe-120 120.92452	122 1.95 min EC,3.800 MeV Cs-122 121.92023	123 2.7 min EC,5.500 MeV Cs-123 122.91884	124 11.9 min EC,2.646 MeV Cs-124 123.91508	125 3.5 min EC,4.600 MeV Cs-125 124.91465	126 100 min EC,1.673 MeV Cs-126 125.91124	127 12.7 min EC,3.450 MeV Cs-127 126.91112
128 2.43 da EC,3.930 MeV Cs-128 127.90830	129 2.23 hr EC,2.432 MeV Cs-129 128.90867	130 0.106% Stable 129.90631	131 11.50 da EC,1.370 MeV Cs-131 130.90693	132 0.101% Stable 131.90505	133 10.51 yr EC,5.500 MeV Cs-133 132.90600	133a 38.9 hr EC,5.500 MeV Cs-133 132.90631
134 2.417% Stable 133.90450	135 6.592% Stable 134.90568	136 7.854% Stable 135.90457	137 11.23% Stable 136.90582	138 71.70% Stable 137.90524	139 83.06 min B-,2.317 MeV La-139 138.90883	140 12.752 da B-,1.047 MeV La-140 139.91059
141 18.27 min B-,3.216 MeV La-141 140.91441	142 10.6 min B-,2.212 MeV La-142 141.91645	143 14.33 sec B-,4.243 MeV La-143 142.92061	144 11.5 sec B-/B-n,3.120 La-144/La-143 143.92294	145 4.31 sec B-,4.930 MeV La-145 144.92694	146 2.22 sec B-,4.120 MeV La-146 145.93017	147 0.893 sec B-/B-n,5.750 La-147/La-146 146.93398
148 0.607 sec B-/B-n,5.120 La-148/La-147 147.93768	149 0.344 sec B-/B-n,7.300 La-149/La-148 148.94202	150 0.3 sec B-,6.600 MeV La-150 149.94557	MASS abund. Halflife Particle, Energy Decay Product(s) Isotopic Mass

Atomic number	-	56		Density	g/mL	3	.5
Atomic weight	u	137	.33	Melting point	K	1002
Bonding radius	A	1	.98	Boiling point	K	2171
Atomic radius	A	2	.78	Heat of vaporization	kJ/mol	142
Ionization Potential	V	5	.212	Heat of fusion	kJ/mol	7	.75
Electronegativity	-	0	.89	Specific heat	J/gK	0	.204
The oxide is a strong base.				Crystal are body centered cubic.
Electron config. : [Xe] 6s²