The knowledge of copper, iron and aluminum, the common characteristics of copper, iron and aluminum

Why copper-tin alloys do not react with water.

All of them are metals, and they are all reductive, malleable, and conductive. The unique physical property possessed by iron is magnetism. Copper:

Copper is a transition element with the chemical symbol Cu and atomic number 29. Xiangshou pure copper is a soft metal, the surface is reddish-orange with metallic luster when it is just cut, and the element is purple-red. Iron:

Iron is a metallic element with atomic number 26 and elemental iron chemical formula: Fe. Pure iron is white or silvery-white with a metallic luster.

All of them are metals, and they are all reductive, malleable, and conductive. The unique gross physical property that iron possesses is magnetism.

Copper: Copper is a transition element, chemical symbol cu, English copper, atomic number 29. Pure copper is a soft metal, the surface is reddish-orange with metallic luster when it is first cut, and the elemental color is purple-red.

Good ductility, high thermal and electrical conductivity, so it is the most commonly used material in cables and electrical and electronic components, and can also be used as a building material, which can form many alloys. Copper alloys have excellent mechanical properties and very low resistivity, the most important of which are bronze and brass. In addition, copper is also a durable metal that can be used many times without compromising its mechanical properties.

Iron: Iron is a metallic element with atomic number 26 and an elemental chemical formula for iron: Fe.

Pure iron is white or silvery-white with a metallic luster. Melting point 1538, boiling point 2750, soluble in strong acid and medium strong acid, insoluble in water. Iron has 0-valent, 2-valent, 3-valent, 4-valent, 5-valent and 6-valent, of which 2-valent and 3-valent are more common, and 4-valent, 5-valent and 6-valent are rare.

Copper hardness is in the middle, aluminum is the softest, and that's what makes them different. The same is heat transfer, malleability, etc.

Same: Both are metals, and can react with agno3 to replace inactive metals. The commonality of metals is generally manifested in physical properties, they have good thermal and electrical conductivity, good plasticity and ductility.

Different: 1. The color and density are different, the density of copper is the largest, and the density of aluminum is the smallest. The density of copper is , the density of iron is , and the density of aluminum is.

2. Different degrees of liveliness, al fe cu

3. Cu and aluminum can be passivated in concentrated acid, but iron cannot.

4. Iron and aluminum can react with acid to replace hydrogen, but copper cannot.

Metal: Copper color: reddish-orange, heat transfer energy away from sunlight.

Copper is not a ferrous metal.

There are three main types of ferrous metals: iron, chromium, and manganese. Copper and aluminum are non-ferrous metals, and they are one of the six most common basic metals in non-ferrous metals, and they are also the two most common metals in the national statistics of ten non-ferrous metals.

Among them, copper is still a heavy metal, while aluminum is a light metal. The luster of the two of them is also different. Copper is a metal with a purplish-red sheen, and aluminum is a metal with a silvery-white sheen.

Both metals can conduct electricity, but the conductivity of aluminum is much worse than copper, but many institutions are considering the use of aluminum instead of copper. These are all seen on the metal encyclopedia, if you want to have a more comprehensive understanding of the commonalities and differences between these two metals, you can use the computer to search the metal encyclopedia to see.

There are many kinds of iron minerals, and there are about 300 kinds of iron minerals and iron-containing minerals that have been discovered, of which more than 170 are common. However, under the current technical conditions, the main ones with industrial utilization value are magnetite, hematite, hematite, ilmenite, limonite and siderite.

The important minerals of copper include chalcopyrite, chalcoite, chalcopyrite, and malachite, and the chemical formulas of the important factors of these minerals are Cufes2, Cu2S, Cu2O, CuCO3·Cu(OH)2, respectively

The high content of aluminum in the earth's crust ranks third after silicon and oxygen, and is mainly found in aluminosilicate ores, as well as bauxite and cryolite. Alumina is a white amorphous powder that comes in several variants, the most well-known of which are A12O3 and Al2O3. Corundum existing in nature belongs to an Al2O3, its hardness is second only to diamond, high melting point, acid and alkali resistance, often used to make some bearings, abrasives, refractory materials.

Such as corundum crucible, can withstand high temperatures of 1800. Corundum comes in a variety of colors due to the presence of different impurities. For example, those containing trace amounts of Cr(III) are red in color and are called rubies; Those containing Fe(II), Fe(III) or Ti(IV) are called sapphires.

Iron: Hematite (ferric oxide), magnetite (ferric oxide).

Copper: cufes2, basic copper carbonate.

Aluminum: cryolite (naalf6), corundum (aluminum oxide).