For the case of electrons an important restriction comes into play. 對電子而言,有一個(gè)重要的限制性條件在起作用。
Alkanes have only single covalent bonds, meaning that the bonds are formed by two carbon atoms sharing a pair of electrons. 鏈烷只有單一的共價(jià)鍵,這意味著(zhù)共價(jià)鍵是由兩個(gè)碳原子分享一對電子。