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In the modern periodic table, elements are arranged in order of increasing:

Correct answer: D. atomic number

Henry Moseley showed in 1913 that atomic number, the number of protons, is the true basis of the periodic table, which removed anomalies in Mendeleev's mass-based order.

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Answer and explanation

The correct answer is D. atomic number

Henry Moseley showed in 1913 that atomic number, the number of protons, is the true basis of the periodic table, which removed anomalies in Mendeleev's mass-based order.

Topic: Atoms, Elements and Alloys MCQs · Subject: Everyday Science