Question

1. Name a metal which is always found in native state.
2. Most abundant metal on the surface of the earth is?
3. Define an ore.
4. Name the ore from which iron is extracted.
5. What is the difference in ore and mineral?
6. Name a metal which is found in both the native as well as combined state.
7. Name the most abundant element in earth crust.
8. Diamond is made up of which element?
9. Write some special characteristics of metals.
10. Diamond is a non metal but still it shines. why?
11. Name the process by which metals are extraced from their ore.
12. Name a metal that catches fire when kept in open atmosphere.
13. Define metalloids with example.
14. Why elements are considered as pure subsatnces?
15. All the minerals are ores, true/false?​

Answer 1

Answer:

1 arsenic, bismuth, cadmium, chromium, cobalt, indium, iron, nickel, selenium, tantalum, tellurium, tin, titanium, and zinc.

2 Aluminum

3 Ore is natural rock or sediment that contains desirable minerals, typically metals, that can be extracted from it. ... Metal ores are generally oxides, sulfides, silicates, native metals such as copper, or noble metals such as gold. Ores must be processed to extract the elements of interest from the waste rock.

4 haematite

5 A mineral is a naturally occurring solid that has a crystalline structure and a definite chemical formula. An ore is a rock that contains minerals in concentrations that are high enough for economical extraction.

6