「氦」：修訂間差異

<span style="color:rgb(0,0,0);font-family:Arial,SimSun;line-height:24px;">英文名称：Helium</span>

<span style="color:rgb(0,0,0);font-family:Arial,SimSun;line-height:24px;">原子序数：2，质量数：4.003</span>

<span style="color:rgb(0,0,0);font-family:Arial,SimSun;line-height:24px;">同位素：有许多呢！</span>

<span style="color:rgb(0,0,0);font-family:Arial,SimSun;line-height:24px;">原子结构：中间一个原子核，外围有两个电子</span>

<span style="color:rgb(0,0,0);font-family:Arial,SimSun;line-height:24px;">氦元素既是稀有气体元素，又是金属元素。是目前为数不多的气态金属。地球上已知的气态金属只有氦和鎶。</span>

<span style="color:rgb(0,0,0);font-family:Arial,SimSun;line-height:24px;">氦单质制取方法：</span>

<span style="color:rgb(0,0,0);font-family:Arial,SimSun;line-height:24px;">氢原子电解法</span>

<span style="color:rgb(0,0,0);font-family:Arial,SimSun;line-height:24px;">H==(通电)==H{+}+e{-}</span>

<span style="color:rgb(0,0,0);font-family:Arial,SimSun;line-height:24px;">H{+}+e{-}==(5.13×10^51zmy锑场)==He</span>

<span style="color:rgb(0,0,0);font-family:Arial,SimSun;line-height:24px;">氦有关化合物：</span>

<span style="color:rgb(0,0,0);font-family:Arial,SimSun;line-height:24px;">氢氧化氦（He(OH)[2]），红色和绿色固体，不溶于水。</span>

<span style="color:rgb(0,0,0);font-family:Arial,SimSun;line-height:24px;">二氯化九氦，氦气与超盐酸反应的产物，彩色固体，性质奇特，具有强氧化性和强还原性。</span>

[[Category:元素]]