The metal thalium occurs naturally as 30% thalium-203 & 70% of thalium-205. calculate mass of thalium
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Explanation:
Postulates of Bohr's atomic model
Postulates of Bohr's Model of an Atom
In an atom, electrons (negatively charged) revolve around the positively charged nucleus in a definite circular path called orbits or shells. Each orbit or shell has a fixed energy and these circular orbits are known as orbital shells.
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