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Elementi Chimici Primari | Primary Chemical Elements |
BERILLIO (P2-4-Be) | BERYLLIUM |
MAGNESIO (P3-12-Mg) | MAGNESIUM |
CALCIO (P4-20-Ca) | CALCIUM |
STRONZIO (P5-38-Sr) | STRONTIUM |
BARIO (P6-56-Ba) | BARIUM |
RADIO (P7-88-Ra) | RADIUM |