氫氣球很常見：各種慶典空中飄揚的大型氫氣球；氫氣球是輕質袋狀或囊狀物體充滿氫氣，氫氣輕，其密度為0.0899克每升，靠氫氣的浮力可以向上漂浮的物體就叫氫氣球。氫氣球一般有橡膠氫氣球、塑料膜氫氣球和布料涂層氫氣球幾種，較小的贛州氫氣球，當前多用于兒童玩具或喜慶放飛用。

氫(qing)(qing)(qing)(qing)氣(qi)(qi)(qi)(qi)(qi)球(qiu)里(li)是(shi)(shi)氫(qing)(qing)(qing)(qing)氣(qi)(qi)(qi)(qi)(qi)，氫(qing)(qing)(qing)(qing)原子是(shi)(shi)元素周期(qi)表它(ta)只含一個質(zhi)子相對分子量小氫(qing)(qing)(qing)(qing)氣(qi)(qi)(qi)(qi)(qi)的(de)密度小。其實只要是(shi)(shi)密度比空氣(qi)(qi)(qi)(qi)(qi)輕(qing)的(de)都(dou)可(ke)以(yi)用，但是(shi)(shi)就(jiu)不(bu)叫“氫(qing)(qing)(qing)(qing)氣(qi)(qi)(qi)(qi)(qi)球(qiu)”了。我們玩氫(qing)(qing)(qing)(qing)氣(qi)(qi)(qi)(qi)(qi)球(qiu)時也存(cun)在(zai)不(bu)安全的(de)因(yin)素，氫(qing)(qing)(qing)(qing)氣(qi)(qi)(qi)(qi)(qi)易燃燒爆炸(zha)，如果在(zai)人口密集區存(cun)有大量氫(qing)(qing)(qing)(qing)氣(qi)(qi)(qi)(qi)(qi)球(qiu)，就(jiu)要當(dang)心自身(shen)的(de)安全，注意不(bu)要讓氫(qing)(qing)(qing)(qing)氣(qi)(qi)(qi)(qi)(qi)和氯氣(qi)(qi)(qi)(qi)(qi)混合(he)，當(dang)它(ta)們的(de)比值達(da)到1:1時，即使陽光直(zhi)射也會發(fa)生爆炸(zha)，所以(yi)可(ke)以(yi)充(chong)氫(qing)(qing)(qing)(qing)氣(qi)(qi)(qi)(qi)(qi)和氦(hai)氣(qi)(qi)(qi)(qi)(qi)，因(yin)為這兩種氣(qi)(qi)(qi)(qi)(qi)體(ti)都(dou)比空氣(qi)(qi)(qi)(qi)(qi)要輕(qing)。充(chong)氦(hai)氣(qi)(qi)(qi)(qi)(qi)的(de)比較多，因(yin)為氦(hai)氣(qi)(qi)(qi)(qi)(qi)是(shi)(shi)惰性氣(qi)(qi)(qi)(qi)(qi)體(ti)，比較安全。氫(qing)(qing)(qing)(qing)氣(qi)(qi)(qi)(qi)(qi)么，純凈的(de)氫(qing)(qing)(qing)(qing)氣(qi)(qi)(qi)(qi)(qi)自己不(bu)會爆炸(zha)，只是(shi)(shi)和氧(yang)氣(qi)(qi)(qi)(qi)(qi)混合(he)后遇火會爆炸(zha)，考(kao)慮安全問題，比較少用氫(qing)(qing)(qing)(qing)氣(qi)(qi)(qi)(qi)(qi)充(chong)氣(qi)(qi)(qi)(qi)(qi)球(qiu)了。

氣球升空原理：

氣球受自身的重(zhong)力和空氣浮力

自(zi)身重力=氣(qi)(qi)球重力+球內氫氣(qi)(qi)重力

空氣(qi)(qi)浮力(li)=空氣(qi)(qi)平均(jun)密度*g*氣(qi)(qi)球體積。