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Periodic Classification of Elements — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10SciencePeriodic Classification of Elements5 Marks
Question
An element X (atomic number 17) reacts with an element Y (atomic number 20) to form a divalent halide.
  1. Where in the periodic table are elements X and Y placed?
  2. Classify X and Y as metal (s), non-metal (s) or metalloid (s)
  3. What will be the nature of oxide of element Y? Identify the nature of bonding in the compound formed.
  4. Draw the electron dot structure of the divalent halide.
✓

Answer

  1. X is in Group 17, period 3 and Y is in group 2, period 4.
  2. X is a non-metal, While Y is a metal.
  3. Oxide of element Y would be basic. This compound is formed by ionic bond.
  4.  

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