why metal in the middle of metal activity series can't be obtained by heating ors in air please help me I will give u branist. follow u back and give u like plz help me with a good answer​

Metals such as iron, zinc, lead, copper, etc., are in the middle of the reactivity series. These are moderately reactive metals and are usually present as sulphides or carbonates. A metal is obtained from its ore by the processes of reduction or by electrolysis.

we can conclude that the melting point of table salt is above room temperature (it's actually 801 deg c). the melting point of mercury must be below room temperature (- 39 deg c).

the dissolution of polymer can be thermodynamically described in 2 steps.