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12 problems. For each element, the child determines the number of valence electrons. P1: 'Lithium (2,1) → Valence electrons: ___' (1). P2: 'Oxygen (2,6) → ___' (6). P3: 'Neon (2,8) → ___' (8). P4: 'Sodium (2,8,1) → ___' (1). P5: 'Magnesium (2,8,2) → ___' (2). P6: 'Silicon (2,8,4) → ___' (4). P7: 'Ch
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