Logam alkali taneuh nyaéta genep unsur kimia dina golongan 2 tabél périodik:bérilium (Be), magnésium (Mg), kalsium (Ca), strontium (Sr), barium (Ba), jeung radium (Ra). Unsur-unsur ieu mibanda pasipatan anu sarupa: ngagurilap, bodas pérak, logam rada réaktif dina suhu jeung tekanan baku.[1] Sacara stuktur, maranéhna (jeung hélium) papada boga s-orbital pinuh: [1] [2] [3] ieu orbital dua éléktron lengkep anu siap dileupaskeun pikeun ngabentuk kation anu boga muatan +2, sarta kaayaan oksidasi +2.
Logam alkali taneuh | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
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↓ Periode | |||||||||||
2 | Beryllium (Be) 4 | ||||||||||
3 | Magnesium (Mg) 12 | ||||||||||
4 | Calcium (Ca) 20 | ||||||||||
5 | Strontium (Sr) 38 | ||||||||||
6 | Barium (Ba) 56 | ||||||||||
7 | Radium (Ra) 88 | ||||||||||
Legend
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Sadaya logam alkali taneuh nu geus kapanggih kabentuk alami, najan radium ngan ukur kabentuk tina ranté luruh uranium jeung torium, lain unsur primordial.[4]
Rujukan
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