Q11 of 60 Page 138

What similarity do you observe in:

(i) Elements belonging to the same period.


(ii) Elements belonging to the same group.

Elements belonging to the same period have the same number of shells.

Example: Every element in the first period (top row) has one orbital for its electrons. All the elements in the second period (the second row) have two orbitals for their electrons.


(ii) Elements belonging to the same group have same number of valence electrons.


More from this chapter

All 60 →
9

Name the most reactive element present in group 17.

 10

Give the formula of oxide formed by a metal if it belongs to the 3rd period and 13th group.

 12

How is the valency of an element related to its electronic configuration? Explain giving suitable example.

 13

Why is the atomic number of the element more important to a chemist than its atomic mass?