Question

atomic mass of all elements rounded off​

Answer 1

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The mass number can be found by rounding the average atomic mass to the nearest whole number. For example, the average atomic mass of lithium is 6.941 a m u. The mass number of lithium is 7 (6.941 rounds to 7).

Answer 2

The mass number can be found by rounding the average atomic mass to the nearest whole number. For example, the average atomic mass of lithium is 6.941 a m u. The mass number of lithium is 7 (6.941 rounds to 7).