April 16, 2024, 02:10:31 PM
Forum Rules: Read This Before Posting


Topic: why ionic radius of K+ > Ca2+?  (Read 8459 times)

0 Members and 1 Guest are viewing this topic.

Offline e_w

  • Very New Member
  • *
  • Posts: 1
  • Mole Snacks: +0/-0
why ionic radius of K+ > Ca2+?
« on: October 02, 2009, 10:13:52 PM »
why ionic radius of K+ > Ca 2+?
they have the same electronic configuration!!
 ??? ???

Offline UG

  • Full Member
  • ****
  • Posts: 822
  • Mole Snacks: +134/-15
  • Gender: Male
Re: why ionic radius of K+ > Ca2+?
« Reply #1 on: October 02, 2009, 10:21:41 PM »
Yes, but potassium has 19 proton, calcium has 20. As a result there is greater nuclear attraction on the outer electrons, drawing them closer to the nucleus.

Offline leela sriram

  • New Member
  • **
  • Posts: 5
  • Mole Snacks: +0/-0
Re: why ionic radius of K+ > Ca2+?
« Reply #2 on: October 25, 2009, 03:57:24 PM »
as positive charge increases decrease in the atomic radii, because of increased  nuclear attraction

Sponsored Links