氦原子核

那么氦原子核的电荷量是多少呢？

So what is the charge on a helium nucleus ?

正因为这样，氦4原子核的质量减少了。

Because of this , the quality of helium-4 nucleus has been reduced .

太阳能是自然界赋予人类的巨大财富，太阳通过内部的氢聚变成氦的原子核反应不停地释放巨大的能量，并不断向宇宙空间辐射能量。

The solar energy is the huge wealth that the nature gives humankind ; the sun keeps releasing huge energy through the fusion reaction that hydrogen becomes helium , and continuously radiates energy toward the astrospace .

由0.7毫克的放射性锔244驱动，apxs利用α粒子（氦原子的原子核）和x-射线撞击样品使之产生可以被测量的化学成分。

Powered by 0.7 milligram of radioactive curium 244 , apxs irradiates samples with alpha particles ( nuclei of helium atoms ) and X-rays to make sensitive measurements of chemical makeup .

所以我们来对屏蔽举两个例子，如果我们在讨论氦，举例来说一个氦原子核或者氦原子。

So let 's take two cases of shielding if we 're talking about , for example , the helium , a helium nucleus or a helium atom .