At normal temperature and pressure, the density of iron is 7.8g/cm3, which is read as 7.8 grams per cubic centimeter.

Density is the mass of a substance per unit volume.

The formula of density: ρ=m/V

ρ——density——kilogram per cubic meter (kg/m^3)

m—— Mass - kilogram (kg)

V - volume - cubic meter (m^3)

The common unit of density is g/cm^3, g/cm^3 unit Large, 1g/cm^3=1.0×10^3kg/m^3.

The density of water is 1.0×10^3kg/m^3, which is read as 1.0×10^3 kilogram per cubic meter. Its physical meaning is: the mass of 1 cubic meter of water is 1.0×10 ^3kg.

Extended information:

Common metal density (g/cm3) arrangement:

Platinum 21.45; gold 19.3; mercury 13.5; lead 11.3; silver 10.5; copper 8.9; Iron 7.86; Manganese 7.3

Chromium 7.2; Titanium 4.55; Aluminum 2.69; Magnesium 1.74; Calcium 1.55; Sodium 0.97; Potassium 0.87; Lithium 0.54

Iron is a metal element , atomic number 26, chemical formula of iron: Fe. Pure iron is white or silver-white and has a metallic luster. It has a melting point of 1538°C and a boiling point of 2750°C. It is soluble in strong acid and medium-strong acid, but insoluble in water. Iron has 0, 2, 3 and 6 valences, of which 2 and 3 are more common, while 6 is rare.

Iron is widely distributed in life, accounting for 4.75% of the crust's content, ranking fourth after oxygen, silicon, and aluminum. Pure iron is a silver-white metal with good flexibility and ductility. It is used to make the iron core of generators and motors. Iron and its compounds are also used to make magnets, medicines, inks, pigments, abrasives, etc., which is what is called in industry. One of the "black metals" (the other two are chromium and manganese) (in fact, pure pig iron is silver-white.

Iron is called a "black metal" because the surface of iron is often covered with a The main component of the layer is a protective film of black ferric oxide). In addition, the human body also contains iron. Divalent ferrous ions are an important component of hemoglobin and are used for oxygen transportation.

Appearance and shape: Pure iron is a metal crystal with a silver-white metallic luster, usually in the form of gray to gray-black high-purity iron wire-colored amorphous fine particles or powder.

It has good ductility, electrical conductivity and thermal conductivity.

It has strong ferromagnetism and is a magnetic material.

The specific heat capacity is 460J/(kg·℃).

The propagation speed of sound in iron: 5120m/s.

Pure iron is soft, but if it is an alloy of iron and other metals or iron mixed with impurities, the melting point usually decreases and the hardness increases.

Crystal structure: face-centered cubic and body-centered cubic.

The relative atomic mass of iron is about 56, and the electron configuration of the ground state atoms is: 1s2?2s2?2p6?3s2?3p6?3d64s2. (The bolded part is the valence electron)

Reference: Baidu Encyclopedia - Density Table

Reference: Baidu Encyclopedia - Iron