The elements Li(Z = 3), Na (Z = 11) and K (Z = 19) belong to group 1. (i) Predict the periods they belong.
The elements Li(Z = 3), Na (Z = 11) and K (Z = 19) belong to group 1.
(i) Predict the periods they belong.
(ii) Which one of them is least reactive ?
(iii) Which one of them has the largest atomic radius ?
Give reason to justify.
6 views
1 Answers
(i) The Period number to which these elements belong are
Li=2nd Period
Na =3rd Period
K= 4th Period
(ii) In a Group the chemical reactivity of metals from top to bottom increases. Lithium is least reactive.
(iii) Down the group the number of shells increases, So the atomic radius also increases. The element with the largest atomic radius is Potassium.
6 views
Answered