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Write the correct alternatives: According to Mendeleev's periodic law, properties of elements are periodic function of their.

1. Atomic number
2. Atomic masses
3. Densities
4. Boiling points

Correct answer: Atomic masses

Solution

Mendeleev's periodic law states that the properties of elements are periodic functions of their atomic masses. The modern periodic law uses atomic number instead, but the original law was based on mass.

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