What are the properties of metals and what are the properties of metals

It has physical properties such as electrical conductivity, thermal conductivity, high hardness, high strength, high density, high melting point, and good metallic luster; At the same time, the chemical properties of metals are active, and most metals can react with oxygen, acid solutions, and salt solutions.

It is worth emphasizing that some metals have special physical properties, such as: tungsten has an extremely high melting point, copper has good conductivity, gold has good ductility, platinum has good ductility, mercury at room temperature is liquid, etc. In addition, alloys have better corrosion resistance, greater hardness and strength, and lower melting points than metals.

1) Metals generally have good ductility, and the ductility of metals can be used to make metals into the desired shapes, such as metal molds.

2) Metals have good electrical and thermal conductivity, such as making metals into electrodes, heating utensils, etc.

3) Metals are generally solids, such as iron, copper, aluminum, etc. Only mercury is a special metal, which is normally present in a liquid state.

4) Metals generally exist in the form of chemical compounds, because the properties of metals are relatively active, and a few metals such as gold, platinum, silver, and bismuth exist in a free state. Metallic minerals are mostly oxides and sulfides, and there are also monophosphates.

5) Metals have no oxidation, but metal ions have oxidation, and the weaker the activity, the stronger the ionic oxidation of the ions. Metals are reducible, and the weaker the activity, the weaker the reducibility of metals.

6) Most metals can react with oxygen.

Metal is a substance with lustrous (i.e., strong reflection of visible light), malleable, easy to conduct electricity, heat and other properties. The above properties of metals are related to the presence of free electrons in metal crystals. In nature, the vast majority of metals exist in a chemical state, and a few metals such as gold, platinum, silver, and bismuth exist in a free state.

Most of the metal minerals are oxides and sulfides. Other forms of existence are chlorides, sulfates, carbonates, and silicates. The connection between the metals is a metal bond, so the connection can be re-established by changing positions at will, which is also the reason for the good stretching of metals.

Metallic elements usually exhibit only positive valence in compounds.

It has a metallic luster (generally metals are silvery-white, except for a few with special colors) and is solid (except for mercury) at room temperature

Metals generally have good ductility.

Electrical conductivity. Heat conductivity (resistance).

This is all related to the fact that metals are metallic crystals (polycrystals).

First, metals have a special metallic luster, most of which are off-white, while non-metals are diverse and complex.

Second, except for mercury, which is a liquid at room temperature, other metals are generally solid, and they are relatively heavy and refractory, while many non-metals are gases or liquids at room temperature;

Third, most metals are good at conducting electricity and heat, and non-metals are often not good at conducting electricity and heat, so many electrical appliances, pots, pots, etc. are made of metal;

Fourth, most metals can be broken into thin sheets or drawn into filaments, such as tin foil, copper wire, etc., while solid non-metals are usually brittle.

Of course, that's just that"In general"There are no sharp boundaries. In fact, there are many non-metals that resemble metals, and some metals that have non-metallic properties. For example, the chemical composition of graphite is carbon, not metal, but it has the same gray metallic luster as metal, and is good at heat transfer and conduction.

Antimony, although it is a metal, is very brittle, and it is not easy to transfer heat and electricity, and has some properties of non-metals.

However, the fundamental difference between metals and nonmetals is that the resistance of metals increases with the increase of temperature, that is, the resistance of metals has a positive temperature coefficient of resistance, while the resistance of non-metals decreases with the increase of temperature, that is, it has a negative temperature coefficient.

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Electrical conductivity, flexibility, malleability, corrosion resistance, etc.

1.Heteroheat transfer 2It can conduct electricity 3There is a shiny 4Hard 5There is a tentative 6Does not absorb water.

First, it has a metallic luster.

2. Easy to conduct electricity.

3. Easy heat conduction.

Fourth, it is malleable.

Copper is a chemical element, its chemical symbol is Cu (Latin: cuprum), its atomic number is 29, and it is a transition metal. Copper is a purplish-red luster metal with a density of cubic centimeters.

Melting point, boiling point 2567. Common valencies +1 and +2. Ionization energy electron volts.

Copper is one of the earliest metals discovered by mankind and one of the best pure metals, slightly harder, extremely tough, and resistant to wear. There is also good malleability. Good thermal and electrical conductivity.

Copper and some of its alloys have good corrosion resistance and are stable in dry air. However, in moist air, a layer of green basic copper carbonate Cu2(OH)2CO3 can be formed on its surface, which is called patina. Soluble in nitric acid and hot concentrated sulfuric acid, slightly soluble in hydrochloric acid.

It is easily attacked by alkalis.

Ductility, electrical conductivity, easy thermal conductivity, flexibility.

Q: What are the properties of metals?

A: Ductility, Thermal Conductivity, Electrical Conductivity, Magnetic Conductivity, Hard Properties, Corrosion Resistance.

It should be malleable, and it should not absorb water.

** is the most malleable metal. One gram of gold can be stretched up to 4,000 meters long. If you use 300 grams of ** to draw into filaments, you can start from Nanjing and stretch along the railway line to Beijing. A tonn** drawn filament can go back and forth from the earth to the moon five times.

It can also be pressed into gold leaf, much thinner than paper, with a thickness of only one hundredth of a hundredth of a centimeter. Such a thin gold leaf looks almost transparent, with a hint of green or blue. Thin to a certain extent, it can not only insulate heat, but also transmit light, so the film can be used as a thermal insulation material for astronauts and firefighters' masks.

In winter, the first film is used to reflect the heat rays in the solar radiation into the room, and the room is as warm as spring: in summer, outside the glass window of the house, a layer of ** coating is pasted, which can reflect most of the heat rays of the sun, and the room will not be stuffy.

Although there are so many advantages, there are also many disadvantages. For example, the texture is soft, expensive, and the color is monotonous. If it is combined with other metals to make an alloy, it can not only make up for the shortcomings, but also make the performance better.

Modern alloys have been widely used in industries such as rockets, supersonic aircraft, nuclear reactors, and astronautics. In addition, gold coins and gold jewelry made of ** alloy are also deeply loved by people. The 22k and 18k gold jewelry we usually see are all ** alloys with different components.

The alloy made of ** will turn golden yellow, red, rose, gray, green, until it turns white. The green gold alloy contains 75 percent gold, silver, and cadmium. There is a gold-copper alloy called red copper; A gold-silver alloy called red silver.

When these two alloys are treated with a salt solution, they appear purple or light blue-black.

The amount of gold in the earth's crust is not small, it is estimated that it is about 5/10 billion of the earth's crust, but it is very scattered, and it is really "everywhere"! In addition, there is gold in the scorching vapours around the sun; There is also gold in meteorites; There are really stars in the sky that are "full of gold"; The ocean is rich in gold and is a "big vault".

Metal materials have a wide range of applications in our daily life, and it can be subdivided into two types, namely metals and alloys.

Metal materials have many physical properties, such as electrical conductivity, thermal conductivity, high hardness, high strength, high density, high melting point, and good metallic luster. In addition, metals have active chemical properties, such as most metals can react chemically with oxygen, acid solutions, salt solutions, etc.

Some metals with special physical properties need to be particularly emphasized, such as tungsten with a very high melting point, copper with good conductivity, gold with good ductility, platinum with good ductility, and mercury in a liquid state at room temperature. In addition to this, alloys have better corrosion resistance, hardness, and greater strength and lower melting points than metals.

The properties of metals include luster (strong reflection of visible light), ductility, and electrical conductivity.

The above properties of metals are related to the presence of free electrons in metal crystals. Because the electrons of metals tend to detach, they have good electrical conductivity, and metal elements are usually positive in compounds, but when the temperature is higher, the resistance will increase because of the thermal ** hindrance of the nucleus.

Uses of Metal:

Titanium and titanium alloys: can be used to make jet engines, ship shells, reactors and telecommunications equipment.

Zinc: Zinc is plated on the surface of iron to prevent iron from being corroded; Zinc is also commonly used in electroplating, in the manufacture of copper alloys, and in dry cell batteries.

Copper: Manufactures wires, cables, and various electrical appliances.

Aluminum: to smelt metals with high melting points; It is second only to silver and copper in electrical conductivity and is commonly used in the manufacture of wires and cables.

The above content reference: Encyclopedia - Metal.

Zhang Zexin and conductivity and elongation, etc.

Properties of the metal:

1. Most metals are solid at room temperature, with special luster, high density and opaque.

2. It is rich in ductility and malleability, and the plastic deformation is large.

3. It can conduct electricity and heat.

4. Cions are formed during ionization.

5. It is easy to be oxidized, and most of its oxides are alkaline.

6. The performance changes after alloying.

Classification of metals

Metals can generally be divided into two categories: ferrous metals and non-ferrous metals

1. Ferrous metals. These include iron, manganese, and chromium as well as their alloys, mainly iron-carbon alloys (steel).

2. Non-ferrous metals. It refers to all metals except iron, chromium, and manganese. Non-ferrous metals are roughly divided into five categories according to their density, **, reserves and distribution in the earth's crust, and the discovery and use of people

1) Light non-ferrous metals: generally refer to non-ferrous metals with the following densities, such as: aluminum, magnesium, sodium, potassium, calcium, strontium, barium.

2) Heavy non-ferrous metals: generally refer to non-ferrous metals with a density above them, such as: copper, nickel, lead, zinc, cobalt, tin, mercury, tin, etc.

3)***: Including gold, silver and platinum group elements (platinum, iridium, russian, ruthenium, palladium, rhodium), they are characterized by high density (g cm3), high melting point (1189-3273k), and stable chemical properties.

4) Metalloids: generally refer to silicon, inscription, selenium, arsenic, boron, and their physical and chemical properties are between metals and non-metals.

5) Rare metals: usually refer to the content in nature is very small, the distribution is sparse, the discovery is late, it is difficult to extract from raw materials, including: lithium, rubidium, cesium, beryllium, tungsten, molybdenum, tantalum, niobium, titanium, hafnium, vanadium, rhenium, gallium, indium, thallium, germanium, Greek earth elements and artificial transuranic elements.

The above content reference: Encyclopedia - Metal.