High school chemical valency formulas and valencies in special cases

1) The main valencies of common elements:

chlorochlorobromoiodine negative monovalent; N-monohydrogen silver with potassium sodium. The minus two of oxygen should be remembered first; n-dimagnesium, calcium, barium and zinc.

positive three is aluminum, positive four silicon; Let's put the price change down. All metals are regular; One or two coppers come two or three irons.

Manganese is 24 and 67; The two or four of carbon should be kept in mind. non-metallic negative main is uneven; Chlorine is negative one positive one five seven.

Nitrogen and phosphorus minus three and plus five; Different phosphorus, three nitrogen, two or four. There are negative two, positive, four, six; It will be cooked when you use it while memorizing it.

monovalent potassium hydrochloride sodium silver; Divalent oxygen, calcium, barium, magnesium, zinc, trialuminum, tetrasilicon, pentanitrogen phosphorus;

23 iron, 24 carbon, 24 6 sulfur are all Qi; All copper is most commonly bivalent.

2) The valency of the common root price.

monovalent ammonium nitrate; Hydrohalide hydroxide. permanganate chlorate; Perchlorate acetate.

divalent carbonate sulfate; Manganese hydrosulfate. Suspense ammonium is the normal price; Negative three has a phosphate group.

The special ones you see are one to remember, and there are not too many places to use, and the common ones are not mistaken

Potassium, sodium, hydrogen, silver, positive monovalent, calcium, magnesium, barium, zinc, positive bivalent, copper.

One, two, iron.

Second, three, manganese is positive.

Two, four, six, seven, sulfur is negative and positive.

Fourth, sixth, oxygen is minus two and never changes. Chlorine is negative.

One, one, five, seven, trialuminum, tetrasilicon, pentanitrogen, phosphorus, negative monovalent ammonium, nitrate, hydrohalide, hydroxide, permanganate, chlorate, perchlorate, acetate.

Negative divalent sulfate carbonate, hydrosulfate manganate.

Suspense ammonium is the normal price; Minus three also has phosphate groups.

Valency. potassium, sodium, silver, hydrogen positive bivalent, calcium, magnesium, barium, zinc; Aluminum is positive trioxan minus di, chlorine minus monovalent is the most common; Sulfur has negative two positive four six, positive two positive three iron variable; positive one, two, copper, two four, and the zero price of the element will never change;

I'm sorry if you don't give points!

Potassium monohydrochloride, sodium chloride, silver bromide, mercury oxide, calcium, barium, magnesium, zinc, trialuminum, tetrasilicon, phosphorus, nitrogen, valency should also be managed, 23 iron, 24 carbon, 246 sulfur are complete, copper mercury bivalent is the most common, and the element is zero in mind.

Memorize any mantra and do some more questions to memorize.

1) Monovalent potassium, sodium, silver, hydrochloride, divalent oxygen, calcium, barium, magnesium, zinc, trialuminum, tetrasilicon, pentanitrogen, phosphorus, ditriiron, ditetracarbon, 246 sulfur are complete, copper, mercury, bivalent are the most common, negative monohydroxide, nitrate.

Negative disulfate carbonate minus three remember the phosphate group plus one.

Valence is ammonium 2 high chemical valence formula (2) hydrochloride, potassium, sodium silver, positive monovalent; Calcium, barium, magnesium, zinc, positive bivalent, trialuminum, tetrasilicon, pentazogen, phosphorus; 23 iron, 244 carbon, 246 sulfur are all Qi; Copper is most commonly bivalent. The zero price of the element will never change; chlorochlorobromoiodine negative monovalent; 3. High and high chemical valency formulas (3) Fluorochlorobromide, potassium iodine, sodium, silver, cuprous hydrogen, mercury oxygen, iron, magnesium, calcium, barium, tungsten, manganese, aluminum, copper, bivalent zinc, trivalent iron, phosphorus and aluminum, tetravalent carbon, silicon, pentavalent phosphorus, sulfur valence, 246, 2467, manganese is particularly cooked.

4 What is the use of high chemical valency When the elements are combined with each other, the ratio of the number of reactant atoms is always constant. For example, one sodium must be bound to one chlorine. And one mg must be combined with 2 chloro.

If it is not for this number ratio, it cannot be made to constitute an ionic compound.

anions and constituent covalent compounds.

The outermost electron shell of a molecule's atom.

Become a stable structure. It is not possible to form stable compounds. And because the atom is the smallest particle that cannot be separated in a chemical reaction, when the elements are combined with each other to form a certain compound, the number of atoms of each element must be a certain simple integer ratio.

The concept of valency comes from this, then the number of atoms of an element that are mutually combined determines the valency of this element, and the valency is set to facilitate the representation of the number of atoms that are mutually combined.

monovalent potassium hydrochloride sodium silver; Divalent oxygen, calcium, barium, magnesium, zinc, trialuminum, tetrasilicon, pentanitrogen phosphorus; 23 iron, 24 carbon, 24 6 sulfur are all Qi; Copper-mercury bivalent is the most common.

Valence formula.

The main valency of common elements.

chlorochlorobromoiodine negative monovalent; N-monohydrogen silver with potassium sodium.

The minus two of oxygen should be remembered first; n-dimagnesium, calcium, barium and zinc.

positive three is aluminum, positive four silicon; Let's put the price change down.

All metals are regular; One or two coppers come two or three irons.

Manganese is 24 and 67; The two or four of carbon should be kept in mind.

non-metallic negative main is uneven; Chlorine is negative one positive one five seven.

Nitrogen and phosphorus minus three and plus five; Different phosphorus, three nitrogen, two or four.

Sulfur has minus two, positive, four-six; It will be cooked when you use it while memorizing it.

Common root price formulas:

monovalent ammonium nitrate; Hydrohalide hydroxide.

permanganate chlorate; Perchlorate acetate.

divalent carbonate sulfate; Manganese hydrosulfate.

Suspense ammonium is the normal price; Negative three has a phosphate group.

Metal Activity Order Table:

High school) potassium, calcium, sodium, magnesium, aluminum, manganese, zinc, chromium, iron, nickel, tin, lead, hydrogen; Copper, mercury, silver, platinum.

1. Monovalent hydrochloride, potassium, sodium silver, divalent oxygen, calcium, barium, magnesium, zinc. Trialuminum, tetrasilicon, phosphorus, di, triiron, and 24 carbon. 246 sulfur is complete, and copper mercury bivalent is the most common. The zero price of the element should be remembered, and the minus one hydroxide nitrate. The positive price is ammonium.

2. Potassium, sodium, silver, hydrogen are positive monovalent, and fluorochlorobromo-iodine is negative monovalent. Calcium, magnesium, barium, zinc positive bivalent, aluminum positive three (come) oxygen negative two. Ferrous iron is two iron is three, and copper is one copper is two. Hydroxide nitric acid is negative monovalent, sulfuric carbonate sulfuric acid is negative bivalent. Ammonium root is a positive price, don't forget that the element is zero price.

3. Valency is the property of one atom of an element when it is atomized with other elements. In general, the valence of valency is equal to the number of electrons gained and lost by each atom during compounding, that is, the number of electrons gained and lost when the element can reach a stable structure, which is often determined by the electronic configuration of the element, mainly the outermost electron configuration, and of course may also involve the substable structure composed of sublayers that the subouter shell can achieve.

x0d x0a (high school): potassium, calcium, sodium, magnesium, aluminum, manganese, zinc, chromium, iron, nickel, tin, lead, hydrogen; Copper, mercury, silver, platinum.

Monovalent potassium hydrochloride, sodium silver, divalent oxygen, calcium magnesium, copper, iron, barium, zinc, trivalent aluminum, iron nitrogen, tetravalent manganese, silicon, carbon, and one kind: monovalent hydrochloride, sodium potassium, silver.

Divalent oxygen, calcium, barium, magnesium, zinc.

3. Aluminum, tetrasilicon, pentavalent phosphorus.

Two or three iron, two or four carbon.

Copper-mercury bivalent is the most common.

Hydroxide minus mononitrate.

Negative disulfate carbonate.

The positive price is ammonium.

Five-membered heterocyclic formula: five-membered monoson nitrox-sulfur, pyrrolofuran and thiophene. The five-membered twins are all called azoles, oxythiotherazole. Diazine is about the same as o-m-imidazole, three or four.

Interpretation. The five-membered heterocyclic contains only one atom in the double health, the nitrogen-containing one is called pyrrole, the oxygen-containing one is called furan, and the sulfur-containing one is called thiophene; The five-membered heterocyclic with two atoms is called what azole, of which nitrogen is a fixed atom, the one containing nitrogen and oxygen is called oxazole, the one containing nitrogen and sulfur is called thiazole, and the one containing double nitrogen is called pyrazole, and the one in the interphase position is called imidazole; Those containing three nitrogen and four nitrogen are called triazole and tetrazole.

Valency formula.

Valency is the number of chemical bonds that one atom of an element forms with the atoms of other elements. An atom is made up of the nucleus and the electrons on the periphery, which move in layers, and the atoms of the compound are connected to each other by as many bonding bonds as the valence.

The valence slips smoothly.

Monovalent potassium hydrogen chloride, sodium silver, divalent oxygen, calcium barium, magnesium, zinc, sulfide, aluminum, trisilicon, tetrasilicon, copper, mercury, diferric, ditri, copper, mercury, diiron, dioxide, potassium, magnesium, magnesium, zinc, divalent oxygen, calcium oxygen, barium, magnesium, zinc

Junior high valence.

Potassium, sodium, silver, and hydrogen are monovalent, and barium, zinc, calcium, and magnesium are bivalent.

One or two copper, two and three iron, copper and ferrous iron are low prices.

Aluminum is positive trioxygen minus two, and chlorine is negative one is the most common.

Sulfur has negative two positive four six, positive two positive three iron variable;

Two or three iron, two or four carbon, the zero price of the element will never change.

Negative hydroxide mononitrate, negative disulfate carbonate.

Negative three remember the phosphate group, and the positive one is the ammonium root.