Question

Choose from the following : 6C, 8O, 10Ne, 11Na, 14Si.

A. Element that should be in the same period.
B.Element that should be in the same group.
And also state reason for your selection in each case

Answer 1

( a ). all
b. no one
c.

Answer 2

A) 6C , 8O and 10Ne should lie in the same period, as they have the same number of shells in their atoms and the number of their outer shell is same

B) 6C and 14Si should be in the same group, as they have the same number of valence electrons in their outermost shell with 4 valence electrons each.