Chemistry · Periodic Classification of Elements
Which of the following statements is NOT correct regarding the periodic classification of elements?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1The first ionisation enthalpies of elements generally increase with an increase in atomic number across a period.
- 2For transition elements, the 3d-orbitals are filled with electrons after 3p-orbitals and before 4s-orbitals.✓
- 3Non-metallic elements are fewer in number than metallic elements.
- 4The properties of elements are periodic functions of their atomic numbers.
Correct answer
For transition elements, the 3d-orbitals are filled with electrons after 3p-orbitals and before 4s-orbitals.
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