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)(qing)氣(qi)(qi)(qi)(qi)(qi)(qi)球(qiu)(qiu)(qiu)里是(shi)氫(qing)(qing)(qing)(qing)(qing)氣(qi)(qi)(qi)(qi)(qi)(qi)，氫(qing)(qing)(qing)(qing)(qing)原子(zi)是(shi)元素(su)周期表它(ta)(ta)只含一個質子(zi)相對分子(zi)量(liang)小氫(qing)(qing)(qing)(qing)(qing)氣(qi)(qi)(qi)(qi)(qi)(qi)的(de)密度(du)小。其實只要是(shi)密度(du)比空氣(qi)(qi)(qi)(qi)(qi)(qi)輕的(de)都可以用，但(dan)是(shi)就(jiu)(jiu)不(bu)叫“氫(qing)(qing)(qing)(qing)(qing)氣(qi)(qi)(qi)(qi)(qi)(qi)球(qiu)(qiu)(qiu)”了(le)。我們(men)玩氫(qing)(qing)(qing)(qing)(qing)氣(qi)(qi)(qi)(qi)(qi)(qi)球(qiu)(qiu)(qiu)時(shi)也存(cun)在不(bu)安(an)(an)全的(de)因(yin)素(su)，氫(qing)(qing)(qing)(qing)(qing)氣(qi)(qi)(qi)(qi)(qi)(qi)易燃(ran)燒爆(bao)炸，如果在人口密集區存(cun)有大量(liang)氫(qing)(qing)(qing)(qing)(qing)氣(qi)(qi)(qi)(qi)(qi)(qi)球(qiu)(qiu)(qiu)，就(jiu)(jiu)要當心自身的(de)安(an)(an)全，注意不(bu)要讓氫(qing)(qing)(qing)(qing)(qing)氣(qi)(qi)(qi)(qi)(qi)(qi)和氯氣(qi)(qi)(qi)(qi)(qi)(qi)混合，當它(ta)(ta)們(men)的(de)比值達到1:1時(shi)，即使陽光(guang)直射也會(hui)(hui)發生爆(bao)炸，所以可以充氫(qing)(qing)(qing)(qing)(qing)氣(qi)(qi)(qi)(qi)(qi)(qi)和氦(hai)氣(qi)(qi)(qi)(qi)(qi)(qi)，因(yin)為這(zhe)兩(liang)種(zhong)氣(qi)(qi)(qi)(qi)(qi)(qi)體都比空氣(qi)(qi)(qi)(qi)(qi)(qi)要輕。充氦(hai)氣(qi)(qi)(qi)(qi)(qi)(qi)的(de)比較多，因(yin)為氦(hai)氣(qi)(qi)(qi)(qi)(qi)(qi)是(shi)惰(duo)性(xing)氣(qi)(qi)(qi)(qi)(qi)(qi)體，比較安(an)(an)全。氫(qing)(qing)(qing)(qing)(qing)氣(qi)(qi)(qi)(qi)(qi)(qi)么，純凈(jing)的(de)氫(qing)(qing)(qing)(qing)(qing)氣(qi)(qi)(qi)(qi)(qi)(qi)自己不(bu)會(hui)(hui)爆(bao)炸，只是(shi)和氧氣(qi)(qi)(qi)(qi)(qi)(qi)混合后遇火會(hui)(hui)爆(bao)炸，考慮(lv)安(an)(an)全問題，比較少用氫(qing)(qing)(qing)(qing)(qing)氣(qi)(qi)(qi)(qi)(qi)(qi)充氣(qi)(qi)(qi)(qi)(qi)(qi)球(qiu)(qiu)(qiu)了(le)。

氣球升空原理：

氣(qi)球受(shou)自身的(de)重力(li)(li)和空氣(qi)浮力(li)(li)

自身重(zhong)力(li)=氣球重(zhong)力(li)+球內氫氣重(zhong)力(li)

空氣浮力=空氣平均密度*g*氣球體積。