Question

which element forms two different stable chlorides​

Answer 1

Answer:

An element 'X' forms a chloride with formula XCl

3

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

So, the required element is Aluminium.

Hence, the correct option is C

Answer 2

Phosphorus can form stable chlorides PCl₃ and PCl₅

Explanation:

• Chloride ion is the negatively charged ion that is formed when Chlorine gains an electron from either hydrogen chloride dissolved in water or polar solvents
• Chlorides are found abundantly in nature.
• Chlorides are one of the most important electrolytes found in the blood.
• An element X when forming chloride will have a formula of XCl
• Mostly alkali and alkaline earth metals form halide and they are stable in nature.

• Phosphorus can form stable chlorides PCl₃ and PCl₅