Question

Indicate which of the following statements are true and which is false

  • Periodic Table
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Answer

Question
  1. Chlorine is an element of period 2 and group VII A. 
  2. 90Th is a transuranic element. 
  3. Along a group from top to bottom atomic radii decrease. 
  4. Hydrogen and halogens are diatomic non-metallic elements. 
  5. lonisation energy of elements along a period from left to right decrease.
Answer
  1. True
  2. False; Thorium (Th) is a naturally occurring element with an atomic number of 90, but it is not considered a transuranic element as it does not have an atomic number greater than 92.
  3. False; The atomic radii of elements in a group increase from top to bottom due to the addition of more electron shells, which increases the distance between the nucleus and the outermost electrons.
  4. True
  5. True

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