（A）F
（B）Li
（C）Fe
（D）He
（E）Si
1.Has the greatest ionization energy.
1.有最高的电离能
选D
2.Has colored salts that will produce colored aqueous solutions.
2.有呈颜色的盐会产生呈颜色的水溶液
选C
Answers and Explanations
1.Noble gases are very stable because of their complete outermost principle energy levels.It takes a greater amount of energy to remove an electron from these stable elements.
1.稀有气体非常稳定是由于他们完整的外层能级.那将会耗费较多的能量来从这些稳定的元素中移除一个电子.
2.Transition elements are famous for their multiple oxidation states and colors.Compounds containing iron are usually reddish in color （hemoglobin and rust are examples.）
2.过渡元素因其多种氧化态而闻名.含铁的化合物通常显红色（血红蛋白和铁锈就是例子）