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NEET UG Periodic Classification of Elements — practice questions

Explore 8 free Periodic Classification of Elements questions in NEET UG Science. Open each question or exercise to read its content, reference answers and available explanation.

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Periodic Classification of Elements questions and exercises with answers

Showing questions 1–8 of 8.

As per your syllabus, the MODERN periodic law (post-Moseley 1913) states that properties of elements are a periodic function of which quantity?Read the answer and worked solution →As per your syllabus, the IUPAC system numbers the groups in the modern table from which range, replacing the older IA…VIIA / VIII / IB…VIIB / 0?Read the answer and worked solution →As per your syllabus, in IUPAC systematic nomenclature for Z > 100, what are the digit roots for 1, 2 and 0 respectively?Read the answer and worked solution →As per your syllabus, the IUPAC systematic name + symbol for the element with atomic number 120 are which?Read the answer and worked solution →As per your syllabus, the IUPAC OFFICIAL name + symbol for Z = 104 is which?Read the answer and worked solution →As per your syllabus, the FIRST IONISATION ENTHALPY of an element X represents which process?Read the answer and worked solution →As per your syllabus, the ELECTRON GAIN ENTHALPY ΔₑgH represents enthalpy change for which reaction?Read the answer and worked solution →As per your syllabus, predicting the formula formed by SILICON (Group 14) and BROMINE (Group 17) gives which compound?Read the answer and worked solution →

Worked practice questions

As per your syllabus, the MODERN periodic law (post-Moseley 1913) states that properties of elements are a periodic function of which quantity?

  1. Density
  2. Atomic volume
  3. Atomic mass
  4. Atomic NUMBER
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Correct answer: D. Atomic NUMBER

As per your syllabus, Moseley's X-ray spectra showed Z is more fundamental than atomic mass. **Hence Modern Periodic Law uses atomic number.**

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As per your syllabus, the IUPAC system numbers the groups in the modern table from which range, replacing the older IA…VIIA / VIII / IB…VIIB / 0?

  1. 1A to 8A
  2. 1 to 7
  3. 1 to 18
  4. I to VIII
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Correct answer: C. 1 to 18

As per your syllabus, 1984 IUPAC recommendation: groups numbered 1–18, replacing the old Roman A/B notation.

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As per your syllabus, in IUPAC systematic nomenclature for Z > 100, what are the digit roots for 1, 2 and 0 respectively?

  1. un (u), bi (b), nil (n)
  2. mono (m), di (d), null (nl)
  3. ek (e), do (d), shun (s)
  4. one (o), two (t), zero (z)
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Correct answer: A. un (u), bi (b), nil (n)

As per your syllabus, 0=nil(n), 1=un(u), 2=bi(b), …, 9=enn(e). Suffix '-ium' added.

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