56 Ba Barium 137,33 u

Barium

Período
6
Grupo
2
Bloco
s-bloco
Fase (STP)
Solid

Barium is a soft alkaline earth metal that produces a green flame. Barium sulfate is used in medical X-ray imaging.

About Barium

Barium (Ba) is a soft, silvery alkaline earth metal, element 56, occupying group 2 of period 6 in the s-block. Its electron configuration is [Xe] 6s², its atomic mass 137.33, and its Pauling electronegativity 0.89. Heated in a flame, barium and its salts burn a characteristic green, a property exploited in fireworks. Its most familiar practical role is medical: because barium sulfate is dense and insoluble, patients ingest it as a contrast agent that renders the digestive tract visible under X-rays. Reactive toward air and water, the pure metal is solid at standard conditions and, like calcium above it, favors the +2 oxidation state.

Propriedades físicas

Massa atômica 137.33 u
Fase em STP Solid

Propriedades eletrônicas

Eletronegatividade 0.89

Configuração eletrônica

Configuração [Xe] 6s²

Electron Shell Configuration

Barium electron shell configuration Ba 2e⁻ 8e⁻ 18e⁻ 18e⁻ 8e⁻ 2e⁻
Electron shell structure of Barium — electrons per shell.
Shell Electrons
1 (K) 2
2 (L) 8
3 (M) 18
4 (N) 18
5 (O) 8
6 (P) 2

Position in Periodic Table

Barium position in the periodic table Ba

Bloco e período

Bloco

s p d f

Período

1 2 3 4 5 6 7

Tabela Periódica

Lantanídeos Actinídeos

Reações envolvendo Ba

Barium Sulfate Precipitation

BaCl₂ + Na₂SO₄ → BaSO₄↓ + 2NaCl

Precipitation

Uranium-235 Fission

²³⁵U + ¹n → ¹⁴¹Ba + ⁹²Kr + 3¹n

Nuclear

Barium Chloride and Sodium Sulfate Precipitation

BaCl₂ + Na₂SO₄ → BaSO₄ + 2NaCl

Double Replacement

Formation of Barium Sulfate

BaO + SO₃ → BaSO₄

Synthesis

Decomposition of Barium Peroxide

2BaO₂ → 2BaO + O₂

Decomposition
Ver as 7 reações →

Compounds Containing Barium

Barium Hydroxide

Ba(OH)₂

Barium Sulfate

BaSO₄

Barium Carbonate

BaCO₃

Barium Chloride

BaCl₂

Yttrium Barium Copper Oxide

YBa₂Cu₃O₇

Barium Oxide

BaO

Barium Titanate

BaTiO₃

Barium Ferrite

BaFe₁₂O₁₉

Mais Metal Alcalino-Terroso

4 Be Beryllium 12 Mg Magnesium 20 Ca Calcium 38 Sr Strontium 88 Ra Radium

Frequently Asked Questions

What is Barium?
Barium (Ba) is a chemical element with atomic number 56. It is a solid at standard temperature and pressure, classified as a metal alcalino-terroso.
What are the key properties of Barium?
Barium has an atomic mass of 137.33 u.
What is the electron configuration of Barium?
The electron configuration of Barium is [Xe] 6s2. It is in the s-block of the periodic table.
What is the electronegativity of Barium?
Barium has an electronegativity of 0.89 on the Pauling scale.