Ores mined from earth usually contain unwanted material called

Name the non metal which has placed on left hand side of periodic table with metal:

Elements which can easily from +ve ions by losing electrons are

When iron is exposed to moist air for a long time, its surface acquires a coating of a brown, flaky substance called

In extraction of metals.sulphide ores are converted to

Si0₂ belongs to which flux?

It is not possible to group metals and non-metals on the basis of

Elements which form negative ions by gaining electrons are

Silver is chemically __________ reactive than copper.

The compounds of metals with hydrogen are