Question

'x' a brown coloured shining element with atomic number one unit grater than 'Ni' when burnt in air turns black what is 'x' ? what is black coloured substance
explain it briefly i will mark as brainlist

Answer 1

x is copper.
when copper burns in air it forms copper oxide i.e.black in color.
here is equation for the same:-
2Cu + O2 -> 2CuO