Sodium metal is different from iron and aluminum in physical properties

Physical properties of polyferric sulfate (PFS). First of all, from the simple physical properties, its appearance is mainly divided into yellow-brown solid small granular and reddish-brown liquid shape. It has adsorption.

The liquid is viscous and has a density of 1 at a normal temperature of 20. Dissolved in acid to form iron hydroxide colloid, hydrolysis to form poly and polynucleated ions. Its role in wastewater treatment is the result of the combination of its physical and chemical properties.

Using the chemical properties of its reaction with water, the colloidal substance generated by it is used to undergo an electric neutralization reaction in water, reduce the potential, make the colloidal particles coagulate with each other, and produce adsorption, bridging and cross-linking. Then under the action of physical gravity precipitation, a compact solid sludge is formed. In sewage treatment, polyferric sulfate is used as a chemical agent, which is accompanied by ...

The sodium element is very soft and can be cut with a knife. After cutting the outer skin, sodium can be seen to have a silvery-white metallic luster. Sodium is a good conductor of heat and electricity.

The density of sodium is smaller than that of iron, and the melting point of sodium is the bottom, and sodium also has good ductility, the reason is: sodium has strong metallicity, active nature, large atomic radius, and small molar mass, so the density is small.

The difference in physical properties, sodium is lighter than water, iron and aluminum are heavier than water, and sodium has a lower melting point.

The reason is that the sodium atom belongs to the first main group of metals, the nucleus binding force is relatively small, and the molecule is relatively large, so the density is smaller, and the melting point is also very low.

Sodium: Silvery-white solid, small hardness, can be cut with a knife, less dense than water.

Density: Iron > Aluminum > Sodium.

Hardness: Iron > Aluminum > Sodium.

Melting Point: Iron > Aluminum > Sodium.

The physical properties of sodium metal are as follows:

1. Sodium is a silvery-white cube structure metal, sodium is soft and light, can be cut with a knife, the density is high, and it has corrosion resistance. Its melting point is 883. Sodium is easily oxidized in the air and turns into a dark gray color.

Sodium elemental has good ductility, soluble in mercury and liquid ammonia, and soluble in liquid ammonia to form a blue solution. Sodium has good magnetic conductivity and is a good conductor of heat and electricity.

2. Sodium is located in the 3rd period, group a in the periodic table, and is a representative of alkali metal elements. Sodium is widely distributed in the form of salt on land and in the sea, and sodium is also one of the important components in human muscle tissue and nerve tissue. The chemical properties of sodium are very active, and when heated at room temperature and heated, they are combined with oxygen, and react violently with water, and occur when the amount is large**.

Sodium can also be burned in carbon dioxide, react with low-element alcohols to produce hydrogen, and react with liquid ammonia, which has a weak ionization capacity.

The effects and uses of sodium on the human body are as follows:

1. Stabilize blood pressure: sodium is an important electrolyte in the human body, the main cation of extracellular fluid, and an important factor in maintaining the osmotic pressure and capacity of extracellular liquid crystal. When sodium is increased, blood volume can increase, and vice versa, blood volume can decrease, which is important for maintaining blood pressure stability.

2. Regulate the balance of body fluids: the buffer base in plasma is mainly sodium bicarbonate, which often rises and falls with the increase or decrease of sodium amount, so sodium ions also have a certain role in regulating the acid-base balance of body fluids.

3. Other functions: maintain neuromuscular excitability, constitute a sodium pump, maintain the balance of sodium and potassium ions inside and outside the cell, pure fiber, etc.

When the body is deficient in sodium, the patient can have apathy, weakness, nausea, vomiting, blood pressure drop, muscle cramps and other manifestations, and when the sodium level is too high, the patient can have hallucinations, delirium, thirst, oliguria and other symptoms.

4. Sodium metal is used as a reducing agent to prepare metals such as titanium, zirconium and tantalum. In the foundry industry, it is used as an aluminum-silicon alloy deterioration agent, so that the silicon in the alloy crystal becomes a fine fiber structure to improve the strength and plasticity of the alloy. In the chemical industry, it is used to prepare chemical products such as indigo dye, trimethylphenyl phosphate, fatty alcohol, sodium borohydride, sodium azide, sodium methoxide, sodium ethanol, sodium peroxide, sodium hydride and sodium amino.

Sodium Physical Properties:

Sodium is a silvery-white cube structure metal, soft and light, can be cut with a knife, the density is smaller than water, for, melting point, boiling point.

The new facet has a silvery-white luster, which oxidizes in the air and turns into a dark gray color, which is corrosion-resistant. Sodium is a good conductor of heat and electricity and has good magnetic conductivity, and potassium-sodium alloy (liquid state) is a thermal conductive agent for nuclear reactors.

Sodium element also has good ductility and low hardness, and can be soluble in mercury and liquid ammonia, and soluble in liquid ammonia to form a blue solution. Hardens at -20.

A total of 22 isotopes of sodium have been discovered, ranging from sodium 18 to sodium 37, of which only sodium 23 is stable and the other isotopes are radioactive.

The properties of metals are divided into physical properties and chemical properties, which are mainly reflected in chemical properties.

Special properties of sodium: 1. Sodium reacts with water to form hydrogen and sodium hydroxide.

2. The reaction between sodium and salt is to first react with water to generate sodium and water for hydroxide and lead, and then sodium hydroxide reacts with salt.

3. The reaction between sodium and acid is acid first and then water.

The special properties of magnesium: 1. Magnesium will react with carbon dioxide, nitrogen and chlorine.

The special properties of aluminum: it has amphotericity, can react with both acids and alkalis.

Special properties of iron: 1. Easy to rust.

2. It will react with water vapor to form ferric tetroxide and hydrogen.

3. Displacement reaction with salt.

Physical Properties:Sodium is a silvery-white cube.

Structural metal, soft and light, can be cut with a knife is blind wheel, the density of the letter is smaller than water, for, melting point, boiling point.

Chemical propertiesThe chemical properties of sodium are very active, and when heated at room temperature and heated, they are combined with oxygen, and react violently with water. Sodium can also be found in carbon dioxide.

It reacts with low-level alcohols to produce hydrogen, and liquid ammonia, which has a weak ionization ability.

The equation for the chemical reaction of sodium.

4Na+O2=2Na2O (room temperature).

2Na + O2 = Na2O2 (heated or ignited).

2na+2h2o=2naoh+h2↑

2na+2co2=na2co3+co

2Na + 2RoH = 2Rona + H2 (RoH stands for low elemental alcohol) 10 tons of Na reaction with water, 1947.

10 tons of Na reaction with water, 1947 (3 photos).

2Na+2NH3(L)=2NanH2+H2 (in this reaction, "2NH3(L)" represents liquid ammonia).

Silvery-white cube structure metal. The new facets have a silvery-white sheen that turns dull gray in the air. Soft and light, it is less dense than water and hardens at -20.

It is a silver-white cube, the structure is metallic, golden, soft and light, and can be cut with a knife, and the density is smaller than water.

The texture is soft, silvery-white, low melting point, and the density is smaller than water and greater than kerosene.

Physical Properties:1Silvery-white metal. 2。Soft. 3。It is less dense than water and can float on the surface of the water. 4。Melting point bottom, less than 100 degrees. 5。It can conduct electricity and heat.

Sodium metal is soft and can be cut with a knife. After cutting the outer skin, sodium can be seen to have a silvery-white metallic luster. Sodium is a good conductor of heat and electricity. The density of sodium is, less dense than water, the melting point of sodium is, and the boiling point is.

1) The outermost shell of sodium has 1 electron, and the outermost shell of aluminum atom has 3 electrons, so sodium is easier to lose electrons than aluminum, and the metallicity of sodium is stronger than that of aluminum. (2) The density of sodium is less than that of water, so it will float on the surface of the water, the melting point is low, sodium and water release a lot of heat, so sodium will melt into a small ball, and react with water to generate hydrogen, and the gas generated makes sodium unevenly stressed, so sodium swims everywhere in water, and the reaction equation between sodium and water is: 2Na+2H2 O=2NaOH+H2, so the answer is:

2na+2h 2 o=2naoh+h 2 ↑，bc；(3) Aluminum and sodium hydroxide solution react to form soluble sodium metaaluminate and hydrogen, and the ion equation is: 2al+2h2o+2oh-2alo 2-3H2, so the answer is: 2al+2H2O+2OH-2alo 2-3H2