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

Answer: copper

The shiny brown coloured element is Copper metal. As copper is heated in the air, it reacts with oxygen in the air to form black coloured copper oxide.

2Cu(s) + O2(g) → 2CuO(s)

Copper(Cu)

Copper(Cu) is a chemical element with atomic number 29. It can be classified as a native metal that can occur in nature in its pure form. Few properties of copper are tabulated below.

Atomic number 29
Melting point 1084.62°C, 1984.32°F, 1357.77 K
Boiling point 2560°C, 4640°F, 2833 K
Density 8.96
Relative atomic mass 63.546

For further reference, watch the video

Refer more

Was this answer helpful?

 
   

4 (19)

(39)
(2)

Choose An Option That Best Describes Your Problem

Thank you. Your Feedback will Help us Serve you better.

Leave a Comment

Your Mobile number and Email id will not be published.

*

*

close
close

DOWNLOAD

App Now

Ask
Question