Which one is not true about isotopes?
Correct answer: D. All of these
- A. Same number of neutrons
- B. Same mass number
- C. Same physical properties
- D. All of these
Explanation
Isotopes have different numbers of neutrons and therefore different mass numbers. This difference in mass also leads to slightly different physical properties. Thus, all three statements are untrue for isotopes.
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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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