блин помогите плиз

3

1. Metals have structures.

2. The symbol for iron is Fe.

3. Most metals melt at room temperature.

4. Cooper is used in the production of electrical wires, sockets, etc. because copper is a good conductor of electricity.

5. The properties of aluminum include: low density and therefore light weight, high strength, excellent ductility, ease of processing, excellent corrosion.

6. Unlike most steel grades, aluminum does not become brittle at low temperatures.

7. Aluminum is an excellent conductor of heat and electricity.

8. Anodizing increases the thickness of the oxide and thus improves the natural protection against corrosion.

9. Good electrical conductivity is the same as a small electrical conductor.

10. Eath a copper atom loses an electron and becomes a positive ion.

11. Cooper can be recycled without bad quality.

12. Platinum group metals are also rare metals: ruthenium, rhodium, platinum, osmium, palladium and iridium.

13. Nickel-based alloys are used in many industries.

14. The addition of cobalt to the nickel-iron matrix results in an alloy with a low iron coefficient, constant modulus of elasticity and high strength.

15. Iron is extracted from metals by removing oxygen.

4

1-3, 2-1, 3-5, 4-4,5-2