They form strongly basic oxides and hydroxides,and they react with oxyacids to give stable salts such as carbonates, nitrates , and sulphates.

• 他们形成强碱性的氧化物和氢氧化物，他们和含氧酸反应生成稳定的盐，例如碳酸盐，硝酸盐，和硫酸盐。