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Asked in ETEA MDCAT 2006 2006

For the atomic numbers given below, which pair of elements will have the same chemical properties?

Correct answer: B. 3,11

  • A. 13,22
  • B. 3,11
  • C. 4,24
  • D. 2,4

Explanation

Option B is correct as the elements with atomic numbers 3 and 11 are Lithium and sodium, respectively which are both in the same group, hence they have the same chemical properties.Elements in the same group have the same number of valence electrons and thus have similar chemical properties.

This question appeared on the ETEA MDCAT 2006 paper, which you can sit online with every answer explained.

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About Periodic Properties and Trends

Periodic properties arise from electron configuration and effective nuclear charge, producing trends in atomic and ionic radius, ionization energy, electron affinity, electronegativity, metallic character and reactivity. Comparisons run across periods and down groups, with attention to common exceptions. The topic also relates these trends to the behavior of s-block and p-block elements.

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