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Physics, 03.07.2019 18:30 abrito1559
Refer to peridoic table. niobium (nb) belongs to which group and period? a. group 5; period 5b. group 14; period 5c. group 1; period 4d. group 5; period 3
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Refer to peridoic table. niobium (nb) belongs to which group and period? a. group 5; period 5b. gro...
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