Examlex
Which is the BEST explanation for why standard of living only increases through productivity?
Iron
A strong, hard magnetic silvery-gray metal, extensively used in construction and manufacturing, especially as a component of steel.
Isotopes
Atoms of the same element that have the same number of protons but different numbers of neutrons in their nuclei, resulting in different mass numbers.
Bromine
A halogen element with the symbol Br and atomic number 35, known for its reddish-brown color and use in flame retardants and other chemicals.
Isotope
Atoms of the same element that have the same number of protons but different numbers of neutrons, resulting in different atomic masses.
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