Question

A shiny brown colored element ‘X’ on heating in air becomes a black colored compound. Name the element ‘X’& black the colored compound formed. Also write the equation.

Answer 1

element x is copper.on heating in air it becomes black,the compound is copper oxide
reaction: 2CU+O2-------2CUO.

Answer 2

Hello!!!

X - Copper ( Cu)..

2Cu +O2 = 2Cuo

Compound - Copper oxide..

Hope it helps..
Thanks