Question

an element Z forms ZH3 , ZCl3 ,Z2O3 , ZP when it react with hydrogen , chlorine , oxygen , phosphorus . what is valency of Z , element Z is a metal or non metal

Answer 1

I think so
it's a metal with valency 3
Aluminium

Answer 2

The valency of Z is 3 and it is a metal.

• As per reaction with all the given non-metals, the oxidation state of Z turns out to be +3.
• As we know, Chlorine has a charge of -1 and oxygen has a charge of -2. The valency of phosphorus is -3 and hydrogen has 1 electron in its outermost shell.
• Thus, three ions of Z react with hydrogen and chlorine. One ion combines with phosphorus and 2 ions with oxygen.
• Z is metallic as it combines with non-metals. This states it's the ability to lose electrons and hence electropositive character