State True or False.
Before 1961, the atomic weight standard for elements was based on oxygen and not carbon.

True

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False

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Solution

The correct option is A True
True.
Before 1961, oxygen was used as the reference standard, with an assigned value of 16. The unit of atomic mass was thereby defined as $1 / 16$ the mass of an oxygen atom.

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State True or False.Before 1961, the atomic weight standard for elements was based on oxygen and not carbon.

The correct option is A TrueTrue.Before 1961, oxygen was used as the reference standard, with an assigned value of 16. The unit of atomic mass was thereby defined as 1/16 the mass of an oxygen atom.

State True or False.
Before 1961, the atomic weight standard for elements was based on oxygen and not carbon.

The correct option is A True
True.
Before 1961, oxygen was used as the reference standard, with an assigned value of 16. The unit of atomic mass was thereby defined as $1 / 16$ the mass of an oxygen atom.