What is the non metallic activity sequence table

f>o>cl>n>br>i>s>c>se>te>at>h>p>as>b>si

Extended information: Gases or brittle solids or liquids with no metallic properties under normal conditions, such as the periodic table.

Upper right 15 elements and hydrogen.

Elemental elements of the zero group. Non-metallic elements are a large group of elements, among all the more than a hundred chemical elements.

, non-metals accounted for 23 species. In the periodic table, except for hydrogen, other non-metallic elements are arranged on the right and upper sides of the table, which belong to the p-block. Including hydrogen, boron, carbon, nitrogen, oxygen, fluorine, silicon, phosphorus, sulfur, chlorine, arsenic, selenium, bromine, tellurium, iodine, astatine, helium, neon, argon, krypton, xenon, radon, 80% of non-metallic elements occupy an important position in society.

Most non-metallic atoms have more valence shell S and P electrons, which can form a diatomic molecular gas or a crystal structure of skeleton-like, chain-like or layered macromolecules. Between metals and non-metals, there are arsenic, antimony, silicon, germanium, etc., which are known as metaloids.

When conditions such as temperature or pressure change, metals or non-metals may be transformed. For example, metal tin can be turned into non-metallic gray tin at low temperatures.

The original table is: potassium, calcium, sodium, magnesium, aluminum; zinc, iron, tin, lead, hydrogen; Copper, mercury, silver, platinum, gold.

A law revealed by the order of metal activity is that in the order of metal activity, the higher the position of the metal, the easier it is for the metal to lose electrons and become ions in the aqueous solution, and the stronger its activity; The further back the metal is positioned, the more the metal is cationic.

In aqueous solution, it is easier to obtain electrons and turn them into atoms.

Pay attention to three main points.

1) Scope of application.

The order of metal activity applies only to reactions in aqueous solutions, beyond which it may not necessarily apply.

2) Key points in judging the reaction between metal and acid.

Acid: The acid here generally refers to non-oxidizing strong acids such as dilute sulfuric acid and dilute hydrochloric acid.

Excludes concentrated sulfuric acid.

and strong oxidizing acids such as nitric acid.

Metals: Iron reacts with acids (e.g., dilute sulfuric acid, dilute hydrochloric acid) to form +2-valent ferrous salts.

3) Key points in judging the reaction of metals with salts.

Salt: Salt must be soluble because the reaction of the metal with the salt must take place in solution.

Metal: Iron reacts with salt to form +2 valence ferrous salts.

Commonly usedMetal Activity Order Table

k ba ca na mg al mn zn cr fe co ni sn (h) cu hg pb ag pt au

Namely: potassium, barium, calcium, sodium, magnesium, aluminum, manganese, zinc, chromium, iron, cobalt, tin, lead, hydrogen, copper, mercury, silver, platinum, gold.

The metallicity of various metals.

Decreasing from left to right, corresponding to the simple, generally normal ionic oxidation of the metal.

Increasing from left to right (special: HG2+ metal is roughly like this: from strong to weak, cesium is the strongest, then rare earth, barium, rubidium, then potassium, calcium, sodium, magnesium, lithium, aluminum, beryllium, manganese, zinc, iron, cobalt, nickel, tin, lead, copper, mercury, silver, platinum, gold.

The activity of the metal is independent of the intensity of the reaction. Most people think that cesium reacts with water, while lithium reacts with water very peacefully, and mistakenly think that cesium is more active than lithium, but this view is wrong. The activity of a metal is only and its electrode potential.

Relevant, not intense. As a result, lithium is the most active metal.

The law of metal activity

1. The metals in front can displace the metals in the back from their metal solution. (If the metal is too reactive, it will react directly with the water and will not react with the metal ions in the water.)

2. Theoretically, the metal activity table.

Both the medium iron and the metal in front of it can displace hydrogen from pure water.

3. If only hydrogen ions are considered.

The oxidation of the metal before hydrogen (H) can react with non-oxidizing acids to displace hydrogen.

4. The older the metals, the easier it is and the more they are displaced; Ranked in Echizen.

The easier it is to replace the metal in other compounds.

The sequence of metal activity is as follows:Lithium, cesium, rubidium, potassium, radium, barium, strontium, calcium, sodium, actinium, lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, yttrium, magnesium, americium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, hydrogen, scandium, plutonium, thorium, neptunium, beryllium, uranium, hafnium, aluminum, titanium, zirconium, vanadium, manganese, samarium, niobium, zinc, chromium, gallium, Iron, cadmium, indium, thallium, cobalt, nickel, molybdenum, tin, thulium, lead, copper, technetium, polonium, mercury, silver, rhodium, palladium, platinum, gold.

Factors influencing metal activityThe activity of the metal is to reflect the size of the tendency of the metal to form hydrated ions in the aqueous solution, that is, to reflect the difficulty of the oxidation reaction of the metal in the aqueous solution, it is based on the standard electrode potential of the metal, from the energy point of view, the standard electrode potential of the metal is not only related to the ionization energy of the metal element atoms, but also related to the sublimation energy of the metal (the energy required when the solid element becomes a gaseous atom), the hydration energy (the energy released when the metal cation is combined with hydration) and other factors.

The above content refers to: Encyclopedia - Metal Activity Order Table.

Non-metal activity order table: F>O>Cl>N>Br>I>S>C>Se>Te>AT>H>P>AS>B>Si

Principle: Front-to-back.

Reflects the liveliness of the non-metallic elements.

f>o>cl>n>br>i>s>c>se>te>at>h>p>as>b>si 。

Non-metallic activity, reflecting the liveliness of non-metallic elements. As with metal mobility, the principle of front and back is followed.

The liveliness of a chemical element refers to the ease with which an element reacts with other substances. The easier it is to react with other substances, the more active the elements are. The more difficult it is to react with other substances, the less active the element is, i.e., the more stable it is.

1 The displacement reaction between one metal and another metal salt solution can determine the strength of metal activity, pay attention to grouping, and verify the order of metal activity one by one. Formula: potassium, calcium, sodium, magnesium, aluminum, zinc, iron, tin, lead, hydrogen, copper, mercury, silver, platinum.

2 The order of common non-metallic properties (oxidation): F2(>O2)>Cl2>Br2>I2>S, with which we can know the strong activity and the strength of the reduction of the corresponding ions, but it is the opposite, and the conclusion is: S2->I->br->Cl->F-

The object of non-metallic nature is an element, and the object of oxidation is an elemental substance, both of which refer to the ability to obtain electrons, which are basically considered to be the same at the middle school level, and the same is true for metallic and reductive properties The order of metal activity after the table h is considered to be inactive In the order of non-metallic properties (oxidation), i2, s are considered to be inactive.

f>o>cl>n>br>i>s>c>se>te>at>h>p>as>b>si 。

Non-metallic activity, reflecting the liveliness of non-metallic elements. As with metal mobility, the principle of front and back is followed.

I still understand this knowledge point, let me tell you.

The order of non-metal activity of non-metals is like this: because nonmetals are generally molecules composed of several atoms, and the molecules are common forms of non-metals in the wild belt, so I am arranging the molecular order table here, which is more practical:

Fluorine, chlorine, oxycoal, bromine, nitrogen, sulfur, hydrogen, red phosphorus, iodine, carbon, arsenic, selenium, boron, silicon.

Noble gases: xe>kr>ar>ne>he

In short, the lower left and the higher the right in the periodic table, the stronger it is. Inert gases do not count.

f>o>cl>n>br>i>s>c>se>te>at>h>p>as>b>si 。

Non-metallic activity, reflecting the liveliness of non-metallic elements. As with metal mobility, the principle of front and back is followed.

The order of non-metal activity is like this: because non-metals are generally molecules composed of several atoms, and molecules are common forms of non-metals, so I have a list of molecular orders here, which is more practical:

Fluorine, chlorine, oxygen, bromine, nitrogen, sulfur, hydrogen, red phosphorus, iodine, carbon, arsenic, selenium, boron, silicon.

Noble gases: xe>kr>ar>ne>he

In short, the lower left and the higher the right in the periodic table, the stronger it is. Inert ruler gas does not count.

Application of the Metal Activity Order Table.

The order of metal activity has been a hot topic in the high school entrance examination over the years, and the difficulty of the questions is different, and the question types are different. Therefore, it is very important to have a correct understanding and flexible use of the order table of metal activity. We mainly understand it from the following aspects.

1.The metal reacts with the acid.

1) The metal should be the metal that precedes (h) in the order of metal activity.

2) Ferrous salts are formed when elemental iron is replaced with acid.

3) In addition to reacting with acid, K, Ca, and Na can also be replaced with water at room temperature, but other metals cannot.

2.The metal undergoes a displacement reaction with the salt.

1) In the order of metal activity, only the metal in front can displace the metal in the back from its salt solution, regardless of the position of H. The exception is metals such as K, Ca, and Na, which do not react with the salt solution because they are too reactive, but react with the water in the solution first.

2) When the iron is replaced with the salt solution, only the divalent ferrous salt is formed.

3) Replace different salt solutions with the same metal, and the metals in the salt are replaced first by the metals that are lower in the order of metal activity. The same salt solution is replaced with different metals, and the metal in the salt is replaced first by the metal that is earlier in the order of metal activity.

It is also necessary to know: the metal system has a displacement reaction with the solution, and (in the solution, the first and the back, the farther apart, the first).