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If someone tells you they have a sample of niobium-90, can you tell how many neutrons are in the nucleus

If someone tells you they have a sample of niobium-90, can you tell how many neutrons are in the nucleus
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If someone tells you they have a sample of niobium-90, can you tell how many neutrons are in the nucleus

User Mafujul
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atomic number of nibium= 41
so neutron numbers= 90-41 = 49
User Vijayst
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