These elements, unlike the transition elements, do not exhibit variable oxidation states, and their valence electrons are only present in their outer shell.
这些元素，不像过渡金属那样显示出可变的化合价，他们只有最外层电子参加反应。
2
The result shows that the transition from vibrational to rotational spectrum is mainly caused by the increase of valence nucleon number.
结果表明，从振动能谱向转动能谱的过渡主要是由价核子数增加引起的。
3
The captured sulfur result may increase through decreasing high valence aluminum element and transition metals element content and increasing the low valence vivacious metal element content.