四21世纪的理想能源——氢能氢是最轻的化学元素,在化学元素周期表中排在第一位。在一般情况下,它是一种气体。一提起氢气,许多人都不会感到陌生。像探测高空气象所用的气球,节日里放的彩色气球,大都是充以氢气(由于氢气球容易发生爆炸,故今天的气球内大都使用氦气)。因为 The ideal energy source for the 21st century - Hydrogen Hydrogen is the lightest chemical element and comes first in the chemical periodic table. In general, it is a gas. Many people are not unfamiliar with hydrogen. Like the balloons used to detect the high-altitude weather, the colored balloons placed during the festival are mostly filled with hydrogen (most of today’s balloons use helium because the balloon is prone to exploding). because