The block that writes the symbol of the chemical element in the third year of junior high school

In the third year of junior high school, you only need to memorize the first 20 on the line, five or five memorization, just four sentences, read it several times, pay attention to the correspondence between Chinese characters and symbols, some people don't need to slip away from it, and it will take up to 10 minutes to get it.

Those elements are all morphophonetic characters, divided into metal elements (next to the gold word), gas elements (gas prefix), and the rest are next to the stone characters, which is easy to remember!

Hope it helps you ......

H hydrogen s sulfur The symbol for copper is Cu, N nitrogen, ooxy, al, and chlorine, often written as Cl,

We gave some students nicknames for element symbols, and memorized them like this.

For example, Liu Na sna

It's okay to find a rhythm.,I'm usually five a memorization.,It's quite rhyming.。

Several backs or grouped backs by element (gases, metals).

1. Hydrogen: The chemical symbol is h, pronounced qīng

2. Helium: The chemical symbol is he, pronounced hài

3. Lithium: The chemical symbol is li, read lǐ

4. Beryllium: The chemical symbol is be, pronounced pí

5. Boron: The chemical symbol is b, read péng

6. Carbon: The chemical symbol is c, pronounced tàn

7. Nitrogen: The chemical symbol is n, pronounced dàn

8. Oxygen: The chemical symbol is o, pronounced yǎng

9. Fluorine: The chemical symbol is f, pronounced fú

10. Neon: The chemical symbol is ne, pronounced nǎi

11. Sodium: The chemical symbol is na, pronounced nà

12. Magnesium: The chemical symbol is mg, read měi

13. Aluminum: The chemical symbol is al, read lǚ

14. Silicon: The chemical symbol is si, pronounced guī

15. Phosphorus: The chemical symbol is p, pronounced lín

16. Sulfur: The chemical symbol is s, pronounced liú

17. Chlorine: The chemical symbol is cl, pronounced lǜ

18. Argon: The chemical symbol is ar, a, read yà

19. Potassium: The chemical symbol is k, pronounced jiǎ

20. Calcium: The chemical symbol is ca, pronounced gài

21. Scandium: The chemical symbol is sc, pronounced kàng

22. Titanium: The chemical symbol is ti, pronounced tài

23. Vanadium: The chemical symbol is v, pronounced fán

24. Chromium: The chemical symbol is cr, read gè

25. Manganese: The chemical symbol is mn, read měng

26. Iron: The chemical symbol is fe, pronounced tiě

27. Cobalt: The chemical symbol is co, pronounced gǔ

28. Nickel: The chemical symbol is ni, pronounced niè

29. Copper: The chemical symbol is cu, pronounced tóng

30. Zinc: The chemical symbol is zn, read xīn

The main element symbols to be used in junior high school are: hydrogen (h) oxygen (o), nitrogen (n) chlorine (cl) carbon c sulfur s phosphorus p silicon si potassium k manganese mn copper cu iron fe sodium na calcium ca magnesium mg aluminum al zn lead pb mercury hg silver ag barium ba gold au helium he neon ne (the above 24 elements almost include the elements used in junior high school) It is enough to memorize these element symbols.

The following are only once in the junior high school textbook, and are hardly used.

Tin element Sn (hardly used, only in the metal activity order table) Boron B Lithium Li Beryllium Be

The symbol formulas of the chemical elements in the junior high school are hydrogen, h, oxygen, o, carbon, c, nitrogen, n, copper, cu. Sulfur S Phosphorus is the symbol for P, Mg, Mg. Fluorine F calcium ca, the symbol of iron chlorobon is b, the symbol of silver is ag and so on.

Hydrogen H oxygen is O, C, C, nitrogen, N, copper Cu.

Sulfur S Phosphorus is the symbol for P, Mg, Mg.

Fluorine F calcium Ca, the symbol Fe for iron.

Ci boron chloride is B, and the symbol for silver is AG.

Ai aluminum, Na sodium, Zn, zinc, Mik is potassium.

Gold au tungsten w, hg mercury to br bromine.

Pb lead Si silicon, Sn tin to ba barium.

Manganese mni is iodine, and these symbols are remembered in mind.

An element symbol is a unique symbol used to mark an element, and can also represent an atom of such an element, and most solid elements are also commonly represented by element symbols. Element symbols are usually represented by the first letter (uppercase) of the Latin name of an element, such as carbon-c. If the first letter of several element names is the same, add another letter (must be lowercase) in the element name after the first letter (it must be uppercase) to distinguish it, such as chlorine-cl.

Categories: 1Classification of elements: metallic elements: next to "thum", except for mercury, non-metallic elements: "cyan", "stone" and "gas" indicate the state of their elemental existence in the usual state, and noble gas elements: "gas".

2.How to write element symbols: the principle of one large and two small: fe, cu, mg, cl, h, etc.

3.The meaning of the element symbol representation: it represents an element (kind): it represents an atom (particle) of this element:( knows an element, and the relative atomic mass of the element can also be found).

26 common chemical element symbols: fluorine, chlorine, bromine, iodine, hydrogen, oxygen, nitrogen;

f cl br i h o n

Carbon, silicon, phosphorus, sulfur, helium, neon, argon.

c si p s he ne ar

Potassium, calcium, sodium, magnesium, aluminum, zinc, iron.

k ca na mg al zn fe

Tin, lead, copper, mercury, silver, platinum.

sn pb cu hg ag pt au

A smooth talk about junior high school chemistry knowledge points1. The song of the essence of valence

The essence of valence should be kept accurate, and the gold positive is non-negative elemental zero;

Hydrogen O2 should be remembered that the sum of positive and negative total prices is zero;

Many elements have valence, and the valence varies depending on the conditions.

Note: "Jinzheng" means that the valency of the metal is usually positive: "Non-negative" means that the valency of the non-metal is usually negative.

2. The song of valencePotassium hydrochloride, sodium monovalent silver, bivalent barium oxygen, calcium, magnesium, zinc, trialuminum, tetrasilicon, phosphorus, pentavalent, 246 sulfur are all all. It is not difficult to talk about price change, two or three iron, two or four carbon, three two four five nitrogen are available, two four six or seven manganese to occupy, copper and mercury bivalent is the most common.

CFBROMO-iodine is minus one, and in special cases it is plus seven.

3. Write a song about chemical equationsReactants are written on the left, and products are written on the right; There is an equal sign in the middle, and the conditions should be clearly noted;

Write the correct chemical formula, and the formula should be balanced; Gas and precipitation, the arrow is clearly marked.

20 Chemical Element Symbols:Hydrogen, helium, lithium, beryllium, boron (H, He, Li, Be, B).

Carbon, nitrogen, oxygen, fluorine, neon (C, N, O, F, NE).

Sodium, magnesium, aluminum, silicon, phosphorus (Na, Mg, Al, Si, P).

Sulfur, chlorine, argon, potassium, calcium (S, Cl, Ar, K, Ca).

Significance. Chemical symbols and their use of the rules are the unique language of chemistry, is an important tool for chemical science to study the composition, structure and change of substances, is the basis for us to learn chemistry, junior high school chemistry from the very beginning, we should pay attention to and do a good job in the teaching of chemical terms, so that students are accustomed to using the language of chemical symbols, to correctly express the chemical process and the formation of the group, structure and change of the law of the substance, and cultivate students' logical thinking ability.

Element symbols, molecular formulas, and chemical equations are typical structural forms of chemical terms, and the syllabus clearly states: "Students should be able to write, read, and use them, and understand their chemical meaning." That is, to understand, to know, to be right.

In order to overcome these cognitive difficulties, in the teaching process, students must first understand the meaning of the element symbols, and then deepen their understanding in the teaching of material molecular formulas and chemical equations, so as to form a standardized and fixed chemical language, and will use this chemical language to correctly represent and study various chemical change processes and laws.