alleryStart learning →Which property determines the position of an element in the periodic table?
AMass number
BNumber of neutrons
CDensity
DAtomic number
Answer & Solution
Correct answer: D. Atomic number
1. The modern periodic law uses atomic number as the basis.
2. Elements with the same atomic number are the same element.
3. Position depends on electron configuration determined by atomic number.
4. So atomic number determines the position.
_Source: Selina Concise Chemistry ICSE Class 9, Ch 5 'The Periodic Table'_
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