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UPSC Combined Geo-Scientist

Chemist

  • 3 descriptive papers
  • 200 marks each
  • 3 h per paper

Mains Paper I covers inorganic chemistry.

UPSC Combined Geo-Scientist, Mains · 2016 · Mains Paper I

Q5(a). Diagonal relationship

Question

What is diagonal relationship in the periodic table? Discuss with reference to lithium, magnesium, beryllium and aluminium.

Answer in brief

Diagonally adjacent elements in periods 2 and 3 can have similar charge density and polarising power: Li resembles Mg, and Be resembles Al.

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CoversDiagonal relationshipPeriodic properties

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