Question

an element 'X' forms a chloride with formula XCl 3. the element 'X' would most likely be in the same group of the periodic table as - Li,Na,Mg,Al,Ca.

Answer 1

Since the element forms a chloride XCl3. So valency of element is 3. And out of the following elements Li,Na, Mg,Al,Ca. x would be in the same group of Al as its valency is 3.

Answer 2

Answer:

Aluminium.

Explanation:

An element 'X' forms a chloride with formula $XCl_{3}$

In $XCl_{3}$ compound both elements are shared electrons to form the chemical bonds.

Sharing of elements depends upon their combining capacity known as valency of the element.

Since we know that the valency of lithium,sodium magnesium aluminium and calcium is 1,1,2,3 and 2 respectively.

In this there are three chlorine and we know that the each chlorine required one electron to complete its shell.

So,the required element is Aluminium.