1. The fruit seller uses the watermelon analogy to establish a standard for measuring fruit masses by comparing the weight of other fruits to that of a watermelon. This provides a tangible reference point for assessing and pricing fruits based on their weight.

    The fruit seller uses the watermelon analogy to establish a standard for measuring fruit masses by comparing the weight of other fruits to that of a watermelon. This provides a tangible reference point for assessing and pricing fruits based on their weight.

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  2. The relative atomic masses of all elements are determined by comparing their masses to the mass of a carbon-12 atom, which is assigned a value of exactly 12 atomic mass units.

    The relative atomic masses of all elements are determined by comparing their masses to the mass of a carbon-12 atom, which is assigned a value of exactly 12 atomic mass units.

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  3. In 1961, the standard reference for measuring atomic masses was changed to the carbon-12 isotope, with its atomic mass set at exactly 12 atomic mass units.

    In 1961, the standard reference for measuring atomic masses was changed to the carbon-12 isotope, with its atomic mass set at exactly 12 atomic mass units.

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  4. Initially, scientists determined the atomic mass unit for oxygen by comparing the mass of oxygen atoms to that of hydrogen atoms. Later, it was refined using more accurate methods and standardized against carbon-12.

    Initially, scientists determined the atomic mass unit for oxygen by comparing the mass of oxygen atoms to that of hydrogen atoms. Later, it was refined using more accurate methods and standardized against carbon-12.

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  5. Expressing atomic masses as whole numbers or near to whole numbers makes calculations simpler and clearer, facilitating easier comparison between elements. It also reflects the ratio of isotopes present in naturally occurring samples more accurately.

    Expressing atomic masses as whole numbers or near to whole numbers makes calculations simpler and clearer, facilitating easier comparison between elements. It also reflects the ratio of isotopes present in naturally occurring samples more accurately.

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