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Periodic Classification of Elements — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10SciencePeriodic Classification of Elements1 Mark
Question
Which one has the bigger size?
Na(11) or Cl(17); Cl(17) or F(9)
✓

Answer

  1. Na has the bigger size.
  2. F has the bigger size.
Because if we move through right to left in the modern periodic table then the atomic size increases. And in the case of this question in 1. Na is situated far left in the table than Cl, So its atomic size is bigger. And in 2. F is situated far left in the table than Cl, So F has the bigger atom size.

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