a.State the number of valence electrons, the group number and the period number of each
element given in the following table:
b. State whether the following elements belong to a Group (G), Period (P) or Neither
Group nor Period indicating the letters G or P or N.
Elements in a group generally possess similar properties, but elements along a period
have different properties. How do you explain this statement?
s - block and p - block elements (except 18th group elements) are sometimes called as
'Representative elements" based on their abundant availability in the nature. Is it justified?
Why?
The electronic configuration of the elements X, Y and Z are given below?
a.X=2 b.Y = 2' 6 c. Z = 2,8,2
1) Which element belongs to second period?
2) Which element belongs to second group?
3) Which element belongs to 18th group?
identify the element that has the larger atomic radius in each pair of the following and
mark it with a symbol. ?
(1) Mg , Ca (2) Li , Cs (3)N , P (4) B , A
Identify the element that has the lower Ionization energy in each pair of the following
and mark it with a symbol.
