Main Groups (主族元素): (Group I to O)
Group I - Alkali Metal (鹼金屬):
Group II - Alkaline Earth Metal (鹼土元素):
Group III (第三族):
Group IV - Carbonic Group (碳族):
Group V - Nitric Group (氮族):
Group VI - Oxygenic Group (氧族):
Group VII - Halogen (鹵素族):
Group 0 - Noble Gases (貴族氣體):