What are the valencies of common elements?

Price 1: Monovalent fluorochlorobromo, hydroiodide, and potassium and sodium metal.

Divalent barium oxygen, calcium, magnesium, zinc, aluminum, trisilicon, and tetra are fixed.

It is necessary to pay attention to the price change of chlorine and nitrogen, one or two copper, mercury and three gold.

Ditetracarbon, lead, ditriiron, 246, sulfur, tri-phosphorus.

The main valency of common elements is two:

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.

Valency formula three:

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.

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:

Junior high) potassium, calcium, sodium, magnesium, aluminum, zinc, iron, tin, lead, hydrogen, copper, mercury, silver, platinum.

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

Solubility of salt:

Potassium, sodium, ammonium, nitrate are soluble, hydrochloride is insoluble silver mercurous;

Sulfate is insoluble barium and lead, carbon phosphate is mostly insoluble.

Most acids are soluble and alkaline, and only potassium, sodium, ammonium, and barium are soluble.

Common element valency slips (1):

potassium, sodium, hydrogen and silver are monovalent, calcium, magnesium, zinc, barium are bivalent;

Chlorochlorobromoiodine is negative monovalent, usually oxygen is negative bivalent;

Copper is one and two aluminum, and iron has two and three;

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

Common element valency (2):

Monovalent hydrochloride, lithium potassium, sodium silver, divalent magnesium oxide, calcium, barium, zinc, copper, mercury, 12, iron, 23, carbon, tin, lead, 24, sulfur, minus, 2, positive, 46, minus, 3 to 5, nitrogen and phosphorus, halogen negative. One, one, three, five, seven, three valents remember boron, aluminum, gold. 2008-07-12 18:19 :

37 Report Valency formula The main valency of common elements CFO-iodine 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.

Valency of common elements.

Hydrogen leaker (qīng). Helium (hài). Lithium (lǐ). Beryllium (pí). Boron (péng).

2. Carbon (tàn). Nitrogen (dàn). oxygen (yǎng). Fluorine (fú). 氖 (nǎi).

3. Sodium (nà). Magnesium (měi). Aluminum (lǚ). Silicon (guī). Phosphorus (lín). Sulfur (liú).

4. Chlorine (lǜ). Argon (yà). potassium (jiǎ). Banquet rolling calcium (gài). Scandium (kàng). Titanium (tài). Vanadium (fán).

5. Chromium (gè). Manganese Huixiang potato (měng). Iron (tiě). Cobalt (gǔ). Nickel (niè). Copper (tóng). Zinc (xīn).

20 Common Chemistry Elements:

1 Hydrogen (qīng). 2 helium (hài). 3 lithium (lǐ).

4 Beryllium (pí). 5 boron (péng). 6 carbon (tàn).

7 nitrogen (dàn). 8 oxygen (yǎng). 9 fluorine (fú).

10 捖 (nǎi. 11 sodium (nà). 12 mg (měi).

13 aluminum (lǚ). 14 silicon (guī). 15 phosphorus (lín).

16 sulfur (liú). 17 chlorine (lǜ). 18 argon (yà).

19 potassium (jiǎ). 20 calcium (gài).

1. Elemental valence (English: valence) is the property of an element when one atom is atomized with other elements.

2. In general, the valence of valence 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, it may also involve the substable structure composed of sublayers that can be achieved by the subouter shell.

3. The "valency" of an element is an important property of an element, which is only manifested when it is combined with other elements. That is to say, when the element exists in a free state, that is, when it does not combine with other elements to form a compound, the valency of the elemental element is "0". For example, metal elements such as iron, non-metallic elements such as carbon, and rare gases such as helium.