Question

an element X belongs to 3rd period and group 13 of the modern periodic table determine the valence electrons and the balance of X molecular formula of the compound formed when X reacts with an element Y having atomic number 8 write the name and formula of the compound formed when X combines with chlorine​

Answer 1

Answer:

the element is Aluminium (Al)..

valence electrons = +3

when X reacts with Y -- X2Y3

When X ie. Al combines with Cl. then formula will be= AlCl3.....

Answer 2

Explanation:

Since the element belongs to 3rd period it has three shells

The element belongs to 13th grow its valency will be +3

Valency of element why will be 2

Compound formed - X2Y3

With chlorine it will form XCl3

i.e. x chloride

Here X is aluminium

Therefore aluminium chloride or AlCl3