An element 'X' belong to 3rd period and group 13 of the modern periodic table

CBSE Class 10 CBSE Class 10 Science
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1

An element ‘X’ belong to 3rd period and group 13 of the modern periodic table.

  1. Determine the number of valence electrons and the valency of ‘X’.
  2. What is the molecular formula of the compound formed when ‘X’ reacts with an element ‘Y’? Atomic number = 8.
  3. Write the name and formula of the compound formed when ‘X’ combines with chlorine.
2
  1. Valance electrons of element is 3 and its valency is also 3.
  2. X2 Y3
  3. When X combines with chlorine, it gives XCl3, i.e., 2X + 3Cl2 → 2XCl3.