Moderate

If the proton number of two atoms is the same then it can be concluded that

Correct answer: A. they are isotopes

  • A. they are isotopes
  • B. compounds of both with CI2 will be similar in reactivity toward other compounds
  • C. both have the same colors
  • D. both have the same melting points

Explanation

Isotopes are atoms of the same element (with the same proton number) but can have different numbers of neutrons. This results in different atomic masses for isotopes of the same element.

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About Fundamental Concepts of Chemistry

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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