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caesium ← barium → lanthanum sr ↑ ba ↓ ra periodic table general name, symbol, number barium, ba, chemical series alkaline earth metals group , period , block , , s appearance silvery white atomic mass ( ) g/mol electron configuration [ xe ] s electrons per shell , , , , , physical properties phase solid
stable with neutrons barium (chemical symbol ba, atomic number ) is a soft, silvery chemical element classified as an alkaline earth metal . given its reactivity with air , it is never found in its pure form in nature. in addition, its oxide reacts with water and carbon dioxide and is not found as a mineral...
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