A list of chemical symbols used in junior high school, and what are the chemical symbols in junior h

Sulfuric acid H2SO4 nitrate Hno3 HCl HCl potassium permanganate KMNO4 basic copper carbonate Cu2(OH)2CO3

Sodium carbonate, Na2CO3, sodium bicarbonate, NaHCO3, Methane, NH4, Ammonia, NH3, Ammonia, Manganese dioxide, MNO2

Hydrogen peroxide, H2O2, magnesium oxide, MGO, copper oxide, Cuo, iron oxide, Fe2O3, ferric tetroxide, Fe3O4, ferrous oxide, Feo

Sodium sulfate, Na2SO4, copper sulfate, CuSO4, copper chloride, CuCl2, sodium chloride, NaCl, ethanol (alcohol), CH3OH

Elemental unit molecules make noble gases like HE

The other unit molecules are diatomic such as H2

Whether you are a teacher, a student or a parent of a student, if you want to memorize these things, it is best to summarize them yourself, and other people's things can be used for reference.

Memorize common element symbols, and then learn to write chemical formulas.

The first 20 elements are added with iron and copper.

The first 20 names and symbols of the periodic table of chemical elements: hydrogen (H), helium (He), lithium (Li), beryllium (BE), boron (B), carbon (C), nitrogen (N), oxygen (O), fluorine (F), neon (Ne), sodium (Na), magnesium (mg), aluminum (Al), silicon (Si), sulfur (S), chlorine (Cl), argon (Ar), potassium (K), calcium (Ca).

Periodic Table: The periodic table is a list of chemical elements sorted by atomic number, from smallest to largest. The list is roughly rectangular in shape, with spaces in some element periods, so that elements with similar characteristics are grouped into the same family.

Periodic table of chemical elements.

is a list of chemical elements sorted by atomic weight, from smallest to largest. The list is generally rectangular in shape, with spaces in the period of some elements, so that elements with similar characteristics are grouped in the same group, such as alkali metal elements, alkaline earth metals, halogen elements, noble gases, non-metals, transition elements, etc.

This results in the periodic table forming an elemental partition with seven primary families, seven secondary groups, and zero families. Because of its ability to accurately ** the properties of various elements and the relationships between them, the periodic table is widely used in chemistry and other scientific fields as a useful framework for analyzing chemical behavior.

1H hydrogen 2he helium.

3LI4BE Beryllium 5B

Borosulfate 6c

Carbon7n nitrogen. 8o Oxygen 9

F-fluorine 10ne

Neon-11NaNa-12

mg, magnesium, 13al, aluminum, 14

Si Silicon 15p

Phosphorus 16s sulfur.

17clCl 18

AR Argon 19K

Potassium 20ca calcium 21

OH hydroxide-22

Co carbonate 23

no Nitrate 24

SO sulfate-25

clo chlorate 26 ammonium NH. I forgot the 27th, sorry. Is it okay to leave your QQ?

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.