CBSE Class 11-science Answered
it was given in alkali metals if
we go down the group the reactivity with water increase.it then turns out francium is the most reactive.but we know that potassium is the most reactive metal plus potassium occur before francium.why this kolaveri
Asked by AKSHAY Suresh | 27 Feb, 2012, 10:57: PM
Expert Answer
Francium is the most active because the one outer electron is the farthest from the nucleus holding it.Francium is an alkaline metal that is it can easily give away its electron, making it highly reactive. Because the atom is so large, there is a shielding effect between the protons in the nucleus, and the valence electron. this blocks the attractive forces, and the other layers of electrons work to repel the valence electron, decreasing the ionization energy even further. the low ionization energy is what makes francium so reactive, that none of it can be isolated effectively.
Answered by | 07 Mar, 2012, 03:21: PM
Concept Videos
-
The s-Block Elements
This video introduces s-block elements and explains the electronic configur... -
The s-Block Elements
This video gives a general introduction to Group 2 elements, explains the e... -
The s-Block Elements
This video explains anomalous behaviour of lithium and beryllium. -
The s-Block Elements
This video explains then comparison between oxides and hydroxides of alkali... -
The s-Block Elements
This video explains the preparation and uses of sodium carbonate and sodium...
CBSE 11-science - Chemistry
Asked by shreyasharma94.11dga | 23 Mar, 2022, 11:42: PM
ANSWERED BY EXPERTCBSE 11-science - Chemistry
Asked by adipadmakarri | 05 Dec, 2021, 11:38: AM
ANSWERED BY EXPERTCBSE 11-science - Chemistry
Asked by mrassam2711 | 15 Jan, 2021, 11:54: PM
ANSWERED BY EXPERTCBSE 11-science - Chemistry
Asked by rajpalsingh5892 | 04 Jun, 2020, 08:29: PM
ANSWERED BY EXPERTCBSE 11-science - Chemistry
Asked by navkirank023 | 02 Jun, 2020, 07:39: PM
ANSWERED BY EXPERTCBSE 11-science - Chemistry
Asked by sangmeshvk2909 | 07 May, 2020, 07:07: AM
ANSWERED BY EXPERTCBSE 11-science - Chemistry
Asked by supreetjoshi28 | 04 May, 2020, 11:12: AM
ANSWERED BY EXPERTCBSE 11-science - Chemistry
Asked by bvk6200718 | 18 Apr, 2020, 07:55: PM
ANSWERED BY EXPERTCBSE 11-science - Chemistry
Asked by binalmarakana16 | 10 Apr, 2020, 10:00: PM
ANSWERED BY EXPERTCBSE 11-science - Chemistry
Asked by binalmarakana16 | 10 Apr, 2020, 02:41: PM
ANSWERED BY EXPERT
