Question

Taking into consideration the period of the elements given below, answer the following questions :
Elements Atomic Radius (pm)
O-66
B-88
C-77
N-74
Be-111
Li-152

(i) Arrange the above elements in a decreasing order of their atomic radii.
(ii) State the period to which the above elements belong:
iii) Why is this arrangement of elements similar to the above period of modern periodic table?
iv) Which of the above elements have the biggest and the smallest atom?
v) What is the periodic trend observed in the variation of atomic radius while going from left
to right within a period?​

Answer 1

Answer:

li be b c n o

2nd period

atomic radius decreases frm going left to right

Answer 2

Answer:

li,be,B,C,N,O.(1)

SECOND PERIOD(2)

biggest atomic size is (O)and smallest is (Li). (3)

atomic radius decreases (4)