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Group IA monoatomic cations
- Group 1: H+, Li+, Na+, K+, Rb+ (Rubidium) , Cs+ (Caesium)
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Group IIA monoatomic cations
Group 2: Be+2 (Beryllium), Mg+2, Ca+2, Sr+2 (Strontium), Ba+2 (Barium)
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Group IIIA monoatomic cations
Group 13: B+3, Al+3
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Group IVA monoatomic anions
- Group 14: C-4 (Carbide = C2-2), Si-4(end in -ide)
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Group VA monoatomic anions
- Group 15: N-3, P-3(end in -ide)
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Group VIA monoatomic anions
- Group 16: O-2, S-2, Se-2 (Selenium), Te-2 (Tellurium)
- (end in -ide)
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Group VIIA monoatomic anions
- Group 17: F-, Cl-, Br-, I-
- (end in -ide)
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