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Elements in the periodic table are arranged in order of increasing atomic mass? True or false
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Elements in the periodic table are arranged in order of increasing atomic mass?

True or false

User Alcalde
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It’s true because the chemical elements are arranged from left to right and top to bottom in order of increasing atomic number, or the number of protons in an atom's nucleus, which generally coincides with increasing atomic mass.
User Joachim Breitner
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