In this video explains how oxygen atoms can form double bonds, and nitrogen atoms can form triple bonds to make diatomic gaseous molecules. But carbon atoms can't form a quadruple bonds, instead bonding to make a network solid. The role of O2, N2 and CO2 in breathing and respiration is explored, and more complex molecules are introduced.

ที่มา : http://AtomicKids.org
ลิงค์ : https://youtu.be/F_1arhpDb8U
อัพโหลดโดย : Ian Stuart