Modern Periodic Law
Which statement best explains the basis of the modern periodic table?
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About This Question
- Subject
- chemistry
- Chapter
- classification of elements and periodicity in properties
- Topic
- modern periodic law
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
Properties of elements are periodic functions of atomic number
Moseley showed that atomic number, not atomic mass, is the fundamental property of an element. When elements are arranged in increasing atomic number, similar valence shell configurations recur at regular intervals, producing periodicity. Hence the modern periodic law is based on atomic number.
This easy difficulty chemistry question is from the chapter classification of elements and periodicity in properties, covering the topic of modern periodic law. It appeared in the 2025 exam.
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