Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!

1. of an element is the measure of the tendency of its atom to attract the shared pair of electrons towards itself in a covalent bond.
2. The process of extracting the ores from the Earth's crust is called .
3. The rocky impurity associated with an ore is called or matrix.
4. is the process of reducing the roasted metallic oxide from the metal in its molten condition.
5. is the metal found most abundantly in the Earth’s crust.
6.The chief ore of copper is .
7.An alloy is a mixture of two or more metals or of one or more metals with certain elements.
8.Rust is chemically known as .
9. Copper vessel on exposure to air and moisture forms a green layer on its surface due to basic
10.The metals can be alloyed to prevent the process of .

Gap-fill exercise