What are the valency formulas for junior high school chemistry?

Monovalent potassium hydrochloride sodium silver.

Divalent oxygen, calcium, barium, magnesium, zinc.

3. Aluminum, 4 silicon, 5 nitrogen and phosphorus.

Two or three iron, two or four carbon.

Two, four, and six sulfur are complete.

Copper-mercury bivalent is the most common.

If the element is zero, it should be remembered.

Negative monohydroxide nitrate.

Negative dicarbonate sulfate.

The positive price is ammonium.

Don't remember the valence because you can't use it at all, remember the valency of the following commonly used elements, enough for you to use in junior high school).

To give you a formula for combining the valency in the textbook: (keep in mind that metals are all positive valence, hydrogen is positive and monovalent, and the element is zero valence).

Monovalent: potassium, sodium, silver, hydrogen, fluorine, bromine (the last two -1 valences are normal, the others are normal) bivalent: calcium, magnesium, barium, zinc, oxygen (the last -2 plus the others are normal) trivalent: aluminum (+3 valence) +1 +2

One and two valence: copper (+1 price is called cuprous +2 price is called copper) such as cu2o is called cuprous oxide cuo is called copper oxide.

Two and three valents: iron (+2 valence is called ferrous + 3 valence is called iron).

The valence state of the atomic group (except for ammonium which is positive, the other atomic groups are negative) is negative one, hydroxide and nitrate.

Negative dicarbonate sulfate.

Only ammonium has a positive price.

1.Our old version:

Potassium, sodium, hydrogen, silver, positive first-order, calcium, magnesium, barium, zinc, positive second-order, fluorochlorobromo-iodine negative first-order, usually oxygen is negative second-order, copper, mercury, positive two, aluminum, positive three, iron has positive two and positive three, and the elemental quality is zero and needs to be recorded.

2.Later, a few more sentences were added:

Carbon has a positive two positive four order, and sulfur has a negative two positive four positive six order.

Aluminum is three, silicon is four, and the nitrogen and phosphorus synthesis order has a variable order.

I hope it will be useful to you, but the teacher told us to memorize it all...

Monovalent: hydrogen, ammonia, potassium, sodium, silver, copper (H, NH4, K, Na, Ag, Cu) Bivalent: calcium, magnesium, barium, zinc, copper, iron, mercury (Ca, Mg, Ba, Zn, Cu, Fe, Hg).

Trivalent: Aluminum, Iron (Al, Fe).

Negative one: fluorine, chlorine, hydroxide, nitrate (F, Cl, OH, NO3) Negative two: oxygen, sulfur, sulfate, carbonic acid (O, S, SO4, CO3) Negative three: phosphate (PO4).

Potassium, sodium, silver, and hydrogen are positive monovalent.

Calcium, magnesium, barium, zinc positive bivalent.

Aluminum is positive trioxygen minus two.

Chloride 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 carbon.

The zero price of the element will never change.

Hydroxide minus mononitrate.

Negative disulfate carbonate.

Only positive one is ammonium.

Potassium, sodium, hydrogen, silver +1 valence.

Calcium, magnesium, barium, zinc, copper +2 valence.

Al3Si4O-2

CFO-iodine-1 valence.

1. Hydroxide nitrate.

2 carbonate sulfate.

1 price is ammonium root well memorized (@

Monovalent potassium hydrochloride sodium silver.

Bivalent calcium, magnesium, barium and zinc.

One or two copper, mercury, two and three iron.

Trivalent metals aluminium and gold.

Usually oxygen is -2 valence and elemental element valence is 0

CFO-1 trivalent pentavalent nitrogen and phosphorus.

246 sulfur 2467 manganese is clear.

Monovalent hydrochloride, potassium, sodium silver, bivalent calcium, barium, magnesium, zinc, trialuminum, tetrasilicon, pentavalent phosphorus, elemental element valence is zero.

Chlorochlorobromoiodine is negative monovalent, usually oxygen is negative bivalent; potassium, sodium, hydrogen, silver, positive monovalent, calcium, magnesium, barium, zinc, copper bivalent; Aluminum trivalent, silicon tetra, phosphorus pentavalent, usually mercury is positive bivalent; 23 iron, 24 carbon, minus 3245 for nitrogen, minus 246 sulfur complete; Bivalent iron is called ferrous iron, and trivalent iron is called iron; The combination of single elements is zero, and the combination of positive and negative is zero.

1-valent potassium, sodium, silver, hydrogen, ammonium +2-valent, calcium, magnesium, barium, zinc, copper, ferrous +3-valent, aluminum, iron.

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

Monovalent potassium bichloride, sodium silver, divalent oxygen, calcium, magnesium, barium, zinc, trialuminum, tetrasilicon, pentanitrogen, phosphorus, ditriiron, 244 carbon, 246 sulfur are complete, and copper and mercury are the most common. Don't forget that the quality price of the unit is zero.

Negative monovalent hydroxide nitrate, divalent sulfate carbonate, negative trivalent is phosphate, and positive monovalent is ammonium. Note: The algebraic sum of the valency of each element of the compound is zero, and the ammonium is an atomic cluster; +2 valence iron is called "ferrous iron"; +1 valence copper is called "cuprous", S is -2 valence in the absence of oxygen, and 4 or 6 valence when combined with oxygen.

The SO3 atomic group is called "sulfite", and the Cl is -1 valence in the absence of oxygen, and 1, +3, +5 or +7 valence when combined with oxygen.

knaagh 1 valence. ca

mgbazn2 valence.

The cualfe has +2 and +3cl

oohno1 valence. so4

CO32 valence.

NH41 valence. Potassium. Sodium.

Silver. Hydrogen. Positive price. Calcium. Magnesium. Barium.

Zinc. Positive bivalent. Copper. Positive two.

Aluminium. Positive three. Iron. There are positive two and three. Chlorine. Minus one.

Oxygen. Minus two. Hydroxide. Nitrate.

Negative one price. Sulfate.

Carbonate. Negative bivalent.

Ammonium root. Positive price.

Monohydropotassium, sodium silver and chlorine.

Barium, magnesium, calcium, zinc, oxygen, sulfur.

One or two coppers. Two or three irons.

Trivalent aluminum. Elemental zero.

I'm a junior in high school this year.

This mantra was taught by my junior high school teacher.

I remember it now.

You can also contact me if you have any questions about chemistry.

I'm a science student. Thank you.

Valency indicates the number of electrons gained and lost by atoms when they are combined with each other. Valency is also a property exhibited by an element in the formation of a compound. In order for students to remember better, I have compiled the valency formulas for junior high school chemistry below for your reference.

Potassium, sodium, silver, hydrogen positive one valent, barium zinc, calcium magnesium positive two valent, one or two copper, two iron, cuprous ferrous iron is low price, aluminum is positive trioxygen negative two, chlorine is negative one is the most common, sulfur has negative two positive four six, positive two positive three iron variable, two three iron, two or four carbon, the zero price of the element is never the same.

Negative hydroxide nitrate, negative disulfate carbonate, minus three remember the phosphate, positive monovalent is ammonium, other elements have valency, first die and then live to calculate.

Monovalent potassium hydrochloride, sodium silver, divalent barium oxygen, calcium, magnesium, zinc.

Trialuminum, tetrasilicon, pentavalent phosphorus, ditetracarbon, tripentanitrogen.

246 iron sulfur 23, copper mercury 12 is a conversion.

The zero price of the element will never change.

Positive potassium, sodium, silver, hydrogen ammonia, n-dicalcium, copper, magnesium, barium, zinc, aluminum, trisilicon, phosphorus, plus five, chlorine, often negative one, negative two, negative two, iron to two, three, carbon, two, four, sulfur, etc., all are complete.

n-monohydrochloride, potassium, sodium, silver, n-dicalcium, magnesium, barium, zinc, mercury.

Positive trialuminum, negative dioxide. Chlorochlorobromoiodine negative monovalent.

Variable price, it's not difficult. It is one sub-copper, and it is two copper.

Positive 2 ferrous iron, positive 3 iron. Negative monohydroxide nitrate, negative disulfite carbonate, positive monovalent ammonium.

monovalent sodium hydrochloride, potassium, silver, divalent magnesium oxygen, calcium, barium zinc;

The trivalent elements are uranium, aluminum, tetravalent carbonate, and pentavalent phosphorus.

Valency formula:

Potassium, sodium, hydrogen, silver, ammonium, copper, calcium, barium, magnesium, zinc, aluminum.

3. Silicon. Fourth, phosphorus is five, and ferrous is positive.

Second, the iron is positive, and the carbon is positive.

2. Positive tetravalent, hydrogen and oxygen, nitrate minus one, chloride minus one, carbonic acid, sulfate minus two, sulfide minus two, oxygen minus two to keep in mind.

Special valency formula

Nitrate NO3:-1, sulfate SO4:-2, carbonate CO3:

2, chlorate CLO3:-1, hydroxide OH:-1, ammonium NH4:

1, phosphate PO4:-3, bicarbonate HCO3:-1, permanganate MNO4:

1. Fluorine, chlorine, bromine, iodine: -1 (hydrofluoric acid, hydrochloric acid, hydrobromic acid and hydroiodic acid).

Root price formula:

monovalent ammonium nitrate; Hydrochlorate hydroxide.

permanganate chlorate; Perchlorate acetate.

divalent carbonate sulfate; Manganese hydrosulfate.

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

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 negative two, positive four, six. It will be cooked when you use it while memorizing it.

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.

1. Formula onePotassium, sodium, silver, hydrogen are monovalent, calcium, magnesium, barium, and zinc are bivalent.

Iron, two, three, copper, one, two, aluminum, four, silicon, two, four carbon.

CFBROMO-iodine nitrogen has a high price, and the elemental zero price will never change.

2, mantra twoPotassium, sodium, silver, and hydrogen are positive 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, formula threeMonovalent potassium hydrochloride sodium silver. Divalent oxygen, calcium, barium, magnesium, zinc.

Three aluminum, four silicon, and pentavalent phosphorus, the valence element is kept in mind.

Di-triiron, di-tetracarbon, heptachlorine, tri-pentanitrogen.

246 sulfur should be distinguished, and copper and mercury are also available. The elemental element valence is zero.

Negative hydroxide mononitrate, minus dicarbonate sulfate.

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

4, formula fourPotassium, sodium, silver, and hydrogen are positive monovalent. Calcium, magnesium, barium, zinc positive bivalent.

Chlorochlorobromoiodine negative monovalent. Usually oxygen is minus bivalent;

Copper is one and two, and aluminum is three; Iron positive two, three, silicon positive four;

Carbon has positive two and positive four; Sulfur has negative two, positive four, six.

minus three plus five nitrogen and phosphorus; Manganese is positive two, four, six, seven.

5, mantra fiveMonovalent potassium hydrochloride, 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.

Negative dicarbonate sulfate, negative trivalent is phosphate.