A shiny brown coloured element ‘X’ on heating in air becomes black in colour. Name the element ‘X’ and the black coloured compound formed.

A shiny brown coloured element ‘X’ on heating in air becomes black

1.	A shiny brown coloured element ‘X’ on heating in air becomes black in colour. Name the element ‘X’ and the black coloured compound formed.
Answer» its SODIUM PLS MARK me as BRAINLIST