Who gave me a valence list of atomic clusters

Carbonate: -2 valent.

Sulfate: -2 valence.

Nitrate: -1 valence.

Hydroxide: -1 valence sulfate, sulfite, carbonate, are -2 valence orthosilicic acid (H4SiO4) root -4 valence, that is, the valence state of the acid element is even, generally -2 or -4 valence, but the common is -2 valence.

Nitrate, chlorate, perchlorate, iodate, permanganate, metaaluminate are -1 valent phosphate-3 valent.

That is, the valence state of the acid element is odd, generally -1 or -3 valence, but the common -1 valence phosphate-3 valence is also common.

Bisulfate, bisulfite, and bicarbonate are all -1 valent is to add a hydrogen ion on the basis of sulfate, sulfite, and carbonate, so it is -1 valence.

Ammonium: +1 valence.

There is also the fact that ammonium (NH4+) is +1 valence.

That's probably all you can see in junior high school:

Nitrate -1

Nitrate -1

Hydroxide-1

Chlorate-1

Perchlorate-1

Permanganate -1

Bicarbonate-1

Manganate-2

Carbonate -2

Phosphate-3

Sulfate-2

Silicate -2

Ammonium +1

Valence tables of common elements and atomic clusters.

Element Name Element Symbol Common Valencies Element Name Element Symbol Common valences.

Potassium K +1 Chlorine C1 -1, +1, +5, +7 Sodium Na +1 Oxygen O-2

Silver ag +1 sulfur s -2, +4, +6

Calcium Ca +2 Carbon C +2, +4

Magnesium mg +2 silicon si +4

Barium be +2 nitrogen n -3, +2, +4, +5 zn zn +2 phosphorus p -3, +3, +5

Copper Cu +1,+2 sulfate, SO42-2 iron, Fe +2,+3, carbonate, CO32--2, aluminum, AL +3, nitrate, NO3- -1

Manganese Mn +2,+4,+6,+7 hydroxide oh- -1 hydrogen h +1 ammonium NH4+ +1

Fluorine F-1 phosphate PO43--3

The valency of an atomic cluster is equal to the sum of the product of the valency of each element in the cluster and its number of atoms.

For example: the valency of sulfate = the valency of sulfur + the valency of oxygen 4

Generally, the valency of each element in the atomic cluster is calculated first, and then superimposed. However, the valency of some elements is uncertain, which can be estimated from the fact that the valency of the compound (containing the atomic cluster) is 0. Because the valency of some elements is generally fixed, such as O-2 H-1, the valency of some common atomic clusters can be remembered, and the commonly used atomic clusters in junior high school are NH4 +1 NO3 -1 Oh -1 ClO3 -1 MNO4 -1 (permanganate) SO4 -2 CO3 -2 MNO4 -2 (manganate) PO4 -3

The valency of each element in an atomic cluster should be remembered by the number of nuclei of the atomic cluster.

For example, the valency of two nitrogen elements in NH4NO3 (ammonium nitrate) is -3 valence in ammonium root and +5 valence in nitrate.

Potassium k +1

Sodium na +1

Silver ag +1

Calcium Ca: +2

Magnesium mg +2

Barium ba +2

Copper Cu +1, +2

Iron Fe +2, +3

Al-al +3

Manganese mn +2, +4, +6, +7

Zinc zn +2

Hydrogen h +1

Fluorine f-1

Chlorine Cl -1, +1, +5, +7

Bromobr-1

Oxygen o-2

Sulfur s-2, +4, +6

Carbon C +2, +4

Silicon si +4

Nitrogen n -3, +2, +3, +4, +5

Phosphorus p -3, +3, +5

Hydroxide OH-1

Nitrate NO3 -1

Sulfate SO4 -2

Carbonate CO3 -2

Ammonium NH4 +1

1. Formula: (where cl, o and bivalent sulfur elements are negative valence, and the rest are positive valence) monovalent cl k na h ag

Bivalent O Ca ba mg Zn

Tri-Al, Four, Si, Pentavalent P

Two-three-fe-two-fourc

Two, four, six, s are complete.

Cu HG bivalent is the most common.

2. Remember: metals only have positive prices, and non-metals generally have both positive and negative prices, so generally when the non-metals are on the far right of the chemical formula, the negative prices are displayed, and when they are in the rest of the positions, they need to be calculated. For example, CL is -1 in KCL and +5 in KCLO3

3. The valency of the acid group can be recorded, or it can be calculated from the chemical formula 4. Generally, the highest positive valence of an element is equal to the number of outermost electrons of its atom, and the negative valence is 8-the number of outermost electrons. For example, the highest positive price of s is +6, and the negative price is -(8-6)=-2

The valency of an atomic cluster is equal to the algebraic sum of the valencies of the elements in it.

For example, the valency of SO4 and the valency of sulfur + oxygen x4 +6+(-2)x4 -2

The valency of common atomic bloons is something to keep in mind. Such as: SO4 (-2), PO3 (-3), OH (-1), NH4 (+1), NO3 (-1),

CLO3(-1), MNO4 (permanganate-1), CO3(-2), etc., which are useful for writing chemical formulas.

For example, the valency of these atomic clusters such as NO3 and CLO3 is -1 valence and is calculated according to the principle that the valency of the elements in the compound is equal to zero.

For example, Hno3 H is +1 valence, and atomic cluster No3 is -1 valence (think of them as an atom).

KCIO3 K is +1 valence, the atomic group CIO3 is -1 valence, and the algebraic sum of the valency of the elements is zero.

In fact, the valency of some common atomic clusters needs to be memorized, and the chemical formulas of acids, bases, and salts should be written in the future.

First, determine that the valency of each ion NO3 in N is positive 5 valence, O normal ions are negative 2 valence, so NO3 is negative 7 valence、、、 Cl has positive 7 valence, O negative 2 valence, so Cl03 is negative valence. The valency of each ion in this type of atomic cluster has its own law, n has NO2 negative valence, then n is positive 3 valence, NO3 has negative valence, and N has positive 5 valence. The important thing is that the accumulation of atoms may show valency when they are in an ionic state, and the two O always show negative 2 valence, and the others are easy to judge、、、 in addition, such atoms can form acids with H ions, so it can also be judged that the atomic cluster should show negative valence according to the positive valence of H.

Whether it is an acid, alkali or salt, the valency of the atomic cluster is fixed, just remember it.

"Memorization" is important for learning chemistry. Although the calculation of chemistry is sometimes more difficult than physics, it is not too difficult to solve problems as long as you master the basic principle knowledge. Unlike physics, chemistry requires not only memorizing the principles of chemistry, but also the "properties" of individual substances, such as the atomic clusters, which are the properties of acids and bases.

And then there's the periodic table to memorize, to remember the elements, their characteristics, and so on (which is very important).

Hope it helps.

Metal valency * number of metal ions + atomic cluster valency * number of atomic clusters = 0 in this formula:

A chemical formula containing atomic clusters is generally composed of metal ions (positive valence parts) and atomic clusters, which can be calculated according to the chemical formula and the sum of positive and negative total valences to zero.

If the valency of the atomic group SiO3 in Na2SiO3 is required, the valency of SiO3 is x, and the equation is:

1*2+x=0

The valency of an atomic cluster is the root valence, which is the algebraic sum of the valencies of the elements that make up the atomic cluster. Since the cluster of atoms is only a part of a compound, its valency cannot be equal to zero. If the sulfur element in sulfate SO4 is +6 valence and the oxygen element is -2 valence, then the valency of sulfate atom group SO4 is:

Some clusters of atoms are the same in composition and written form, but their names and valencies are different, depending on what substance they are present in.

Carbonate CO3 minus bivalent.

Sulfate SO4 minus bivalent.

Hydroxide OH minus monovalent.

Nitrate NO3 minus a valent grip rent.

Ammonium NH4 is positive monovalent.

Chlorate clo3 minus monovalent.

High type of nemanganate MNO4 minus monovalent.

Manganate mnO4 minus bivalent.

The phosphate segment carries the root of PO4 negative trivalent.