Answer :
Final answer:
One box representing one element on the periodic table is an incorrect statement.
Explanation:
Statement C: One box represents one element on the periodic table. This statement is incorrect because some boxes may contain two-letter symbols to represent one element, like O for oxygen or Na for sodium. So, one box does not always equal one element.
Statement D: The modern periodic table is organized by atomic number. This statement is actually true. Elements are arranged in order of increasing atomic number, not atomic mass.
Therefore, the correct answer to the question is Statement C, which is not accurate about the periodic table.
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