Q10 of 60 Page 138

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

13th group consists of the following elements:

Boron (B), Aluminium (Al), Gallium (Ga), Indium (In), Thallium (Ti).


‘Al’ lies in the 3rd period so; the formula of oxide of Aluminium is ‘Al2O3’.


More from this chapter

All 60 →
8

An element X has E.C. = 2, 8, 8, 1 while Y has 2, 8, 7. Which of these is a metal?

 9

Name the most reactive element present in group 17.

 11

What similarity do you observe in:

(i) Elements belonging to the same period.


(ii) Elements belonging to the same group.

 12

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