How many isotopes have odd atomic numbers?
Correct answer: C. 86
- A. 154
- B. 280
- C. 86
- D. 300
Explanation
Total number of isotopes is 280. Out of 280 isotopes 154 have even mass or even atomic no. and 86 have odd atomic mass or no
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Mole calculations connect mass, number of particles and Avogadro's number, while balanced equations provide the mole ratios used in stoichiometry. Questions cover limiting and excess reactants, theoretical yield and percentage yield, including identifying which reactant is consumed first and comparing the actual product with the maximum possible product.
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