6. Groups in the Periodic Table Main Group Elements (Vertical Groups) Group IA - Alkali Metals Group IIA - Alkaline Earth Metals Group IIIA - Boron Family Group IVA - Carbon Family Group VA - Nitrogen Family Group VIA - Oxygen Family (Calcogens) Group VIIA - Halogens Group VIIIA - Noble Gases Other Groups ( Vertical and Horizontal Groups) Group IB - 8B - Transition Metals Period 6 Group - Lanthanides (Rare Earth Elements) Period 7 Group - Actinides
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12. VỘI NỬA BÃO HÒA d 5 , f 7 Cr 24 Mo 42 VỘI BÃO HÒA d 10 , f 14 Cu 29 Ag 47 Au 79