In the third year of junior high school, you need to master chemical formulas, element names, etc

Hydrogen, helium, lithium, beryllium, boron, carbon, nitrogen, oxygen, fluorine, neon, sodium, magnesium, aluminum, silicon, phosphorus, sulfur, chloride, argon, potassium, calcium, manganese, iron, copper, zinc, bromine, iodine, etc.

Dilution solution: M1A1%==M2A2%; d1v1==d2v2, etc.

The first 20 elements of the periodic table; valence law; elements of special nature;

Formula: mass, density, volume, volume of gas under standard conditions.

Element name: hydrogen, helium, lithium, beryllium, boron, carbon, nitrogen, oxygen, fluorine, neon, sodium, magnesium, aluminum, silicon, phosphorus, sulfur, chlorine, argon, potassium, calcium.

The formula for the third chemical element table to memorize:

1. A donkey's foot is asked to take silver, (monovalent potassium hydrochloride sodium silver.) )

Two sheep cover the beauty vest. (Divalent oxygen, calcium, magnesium, barium, zinc.) )

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

3. Aluminum, 4 silicon, pentavalent phosphorus, 23 iron, 24 carbon.

Nitrogen is found in the first to fifth valents, with copper mercury bivalent being the most common.

Positive copper, potassium, potassium, sodium, silver, copper, magnesium, calcium, barium zinc.

3. Aluminum, 44 silicon, 46 sulfur, 245, nitrogen, 35 phosphorus.

157 chlorine 23 ferric, 2467 manganese is positive.

Carbon has positive four and positive two, and then keep the negative price in mind.

Negative iodine bromo, fluorochlorine, negative dioxysulfur, phosphorus triazonide.

2. Divide the five elements into a group and memorize them.

Hhelibeb (hydrogen, helium, lithium, beryllium, boron).

CNOFNE (carbonnitrogenoxyfluorone).

Namgalsip (sodium, magnesium, aluminum, silicon, phosphorus).

Sclarkca (calcium argon thiochloride).

Sctivcrmn (scandium, titanium, vanadium, chromium, manganese).

feconicuzn (iron, cobalt, nickel, copper, zinc).

3. I am hydrogen, I am the lightest, and the rocket relies on me to carry satellites; I'm helium, I'm a scoundrel, and I'm the best at gaining and losing electrons.

I am lithium, which has a low density, and bubbles up when it encounters water and acid; I am beryllium, playing with the skin, although it is difficult to ionize metal.

I'm boron, a little red, and I'm poor when it comes to electrons; I am carbon, slow to react, able to form both chains and rings.

I am nitrogen, I am flame retardant, and ammonia can be synthesized by hydrogenation; I'm oxygen, don't think about it, I'll be panicked when I leave.

I am fluorine, the most vicious, grab an electron and be satisfied; I'm neon, and it's not bad, and the red light is emitted when it's energized.

I am sodium, I have a big temper, and when I encounter acid and water, I will be angry; I'm magnesium, I love beauty the most, and photography fireworks shine brightly.

I am aluminum, at room temperature, in concentrated sulfuric acid to take a bath; I'm silicon, black and gray, and the information elements pile me up.

I am phosphorus, a pest, and my name is on the list of poisons; I'm sulfur, I've been around for a long time, and I'm the best at precipitating metals.

I am chlorine, yellow-green, metallic electrons I rob; I'm argon, the activity is poor, and the neon purple light I will emit.

I'm potassium, add fire, superoxide to the house; I am calcium, body love, bones and teeth I am in.

Methods of learning chemistry in the third year of junior high school

1. Have a firm grasp of chemical terminology.

Serious use of chemical tools is the minimum condition for learning chemistry well. In junior high school, students should master the following chemical terms:

Some element names, element symbols and classifications2Accurately grasp the name, common name and chemical formula of a substanceThe chemical formula is a combination of the type of element and the number of atoms in the smallest particle (generally referred to as a molecule) of the substance. Write accurately, learn to name, and be familiar with common names.

In order to accurately grasp the writing of chemical formulas, students should be proficient in the use of "valency" on the basis of understanding when learning "valency" to ensure that the writing of chemical formulas is accurate.

2. Write chemical equations accurately.

The chemical equation is the correct result of the chemical reaction expressed by the chemical formula, and is based on the chemical reaction facts and the law of conservation of mass to guide the production of the chemical industry.

Writing chemical equations and making relevant calculations according to chemical equations are the key and difficult points for students to learn chemistry. Students should pay attention to this part of learning, understanding and memorization.

Junior high school chemical element symbol formula table: hydrogen h oxygen is o, carbon c nitrogen copper cu. Sulfur S Phosphorus is the symbol for P, Mg, Mg.

Fluorine F calcium ca, iron symbol chlorobon is b, silver symbol is agai aluminum na sodium, zn zn m k is potassium gold au tungsten w, hg mercury to br ao pb lead si silicon, sn tin to bamni is iodine.

1. Element symbols

Element symbols are unique symbols used to mark elements, and can also represent an atom of this 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 (must be uppercase) to distinguish it, such as chlorine-cl.

2. Introduction to the major

Chemistry mainly studies the basic theoretical knowledge of chemistry and the basic operation skills of chemical hail experiments, including the chemical reactions and changes between a single substance and a variety of substances, and understands the mechanism and process of its changes, such as: the process of item combustion, steel rusting, food decay, and grain winemaking, all of which are chemical changes, and through the study of the process of these changes, we can understand the causes and mechanisms of their changes. Keywords:

Rotting, burning, experimenting, dangerous.

Chemical Reaction Engineering", Fundamentals of Chemical Engineering, Inorganic Chemistry, Organic Chemistry, Zheng Yanfan, Analytical Chemistry, Structural Chemistry, Physical Chemistry Some colleges and universities are trained in the following professional directions: Science, Medicine, Industrial Analysis, Chemical Pharmaceutical, Analysis and Testing, Fine Chemical Industry.

Technical enterprises: chemical analysis, chemical engineering, chemical technology, quality management, pharmaceutical enterprises: chemical blending, clinical chemistry, medical technology, pharmaceutical research and development.

The formula of the third chemical element table:Learn the periodic table of elements smoothly: I am the hydrogen skin, I am the lightest, and the rocket relies on me to carry satellites; I'm helium, I'm a scoundrel, and I'm the best at gaining and losing electrons. I am lithium, which has a low density, and bubbles up when it encounters water and acid; I am beryllium, playing with the skin, although the metal is difficult to ionize and burn;

I'm boron, a little red, and I'm poor when it comes to electrons; I am carbon, slow to react, able to form both chains and rings. I am nitrogen, I am flame retardant, and ammonia can be synthesized by hydrogenation; I'm oxygen, don't think about it, I'll be panicked when I leave.

I am fluorine, the most vicious, grab an electron and be satisfied; I'm neon, and it's not bad, and the red light is emitted when it's energized. I am sodium, I have a big temper, and when I encounter acid and water, I will be angry; I am magnesium, I love to grind and make beauty, and photography fireworks shine; I am aluminum, at room temperature, in concentrated sulfuric acid to take a bath;

After entering the third year of junior high school, the pressure of learning is increasing, and mastering good skills can get twice the result with half the effort.

A donkey's foot is asked to take silver, (monovalent potassium hydrochloride sodium silver).

Two sheep cover the beauty vest. (Divalent oxygen, calcium, magnesium, barium, zinc.)

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

3. Aluminum, 4 silicon, pentavalent phosphorus, 23 iron, 24 carbon.

Nitrogen is found in the first to fifth valents, with copper mercury bivalent being the most common.

Positive copper, potassium, potassium, sodium, silver, copper, magnesium, calcium, barium zinc.

3. Aluminum, 44 silicon, 46 sulfur, 245, nitrogen, 35 phosphorus.

157 chlorine 23 ferric, 2467 manganese is positive.

Carbon has positive four and positive two, and then keep the negative price in mind.

Negative bromo-iodine is the same as fluorochloride, negative dioxysulfur, trinitrogen phosphorus.

Divide the five elements into groups and recite them.

Hhelibeb (hydrogen, helium, lithium, beryllium, boron).

CNOFNE (carbonnitrogenoxyfluorone).

Namgalsip (sodium, magnesium, aluminum, silicon, phosphorus).

Sclarkca (calcium argon thiochloride).

Sctivcrmn (scandium, titanium, vanadium, chromium, manganese).

feconicuzn (iron, cobalt, nickel, copper, zinc).

is a list of chemical elements sorted from smallest to largest according to the number of nuclear charges. The list is generally rectangular, with spaces in the period of some elements, so that elements with similar characteristics are grouped into the same family, such as alkali metal elements, alkaline earth metals, halogen elements, rare 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.

The above is the mantra I have compiled from the list of chemical elements, I hope it can help you.

The formula of the third chemical element table:Learn the periodic table of elements smoothly: I am the hydrogen skin, I am the lightest, and the rocket relies on me to carry satellites; I'm helium, I'm a scoundrel, and I'm the best at gaining and losing electrons. I am lithium, which has a low density, and bubbles up when it encounters water and acid; I am beryllium, playing with the skin, although the metal is difficult to ionize and burn;

I'm boron, a little red, and I'm poor when it comes to electrons; I am carbon, slow to react, able to form both chains and rings. I am nitrogen, I am flame retardant, and ammonia can be synthesized by hydrogenation; I'm oxygen, don't think about it, I'll be panicked when I leave.

I am fluorine, the most vicious, grab an electron and be satisfied; I'm neon, and it's not bad, and the red light is emitted when it's energized. I am sodium, I have a big temper, and when I encounter acid and water, I will be angry; I am magnesium, I love to grind and make beauty, and photography fireworks shine; I am aluminum, at room temperature, in concentrated sulfuric acid to take a bath;

I am hydrogen, I am the lightest, and rockets rely on me to carry satellites;

I'm helium, I'm a scoundrel, and I'm the best at gaining and losing electrons.

I am lithium, which has a low density, and bubbles up when it encounters water and acid;

I am beryllium, playing with the skin, although it is difficult to ionize metal.

I'm boron, a little red, and I'm poor when it comes to electrons;

I am carbon, slow to react, able to form both chains and rings.

I am nitrogen, I am flame retardant, and ammonia can be synthesized by hydrogenation;

I'm oxygen, don't think about it, I'll be flustered without me;

I am fluorine, the most vicious, grab an electron and be satisfied;

I'm neon, and it's not bad, and the red light is emitted when it's energized.

I am sodium, with a big temper, and when I encounter acid and water, I will be a big debate;

I'm magnesium, I love beauty the most, and photography fireworks shine brightly.

I am aluminum, at room temperature, in concentrated sulfuric acid to take a bath;

I'm silicon, black and gray, and the information elements pile me up.

I am phosphorus, a harmful spirit, and the list of dramas carrying codes and scattering poisons has my name;

I'm sulfur, I've been around for a long time, and I'm the best at precipitating metals.

I am chlorine, yellow-green, metallic electrons I rob;

I'm argon, the activity is poor, and the neon purple light I will emit.

I'm potassium, add fire, superoxide to the house;

I am calcium, body love, bones and teeth I am in.

I'm titanium, transition comes, shuttle I come cover;

I'm chromium, hexachrome, and the alcohol comes green when it comes over;

I am manganese, with a lot of valence and heptaoxide ** fierce;

I am iron, with a wide range of uses, and stainless steel calls me Lord;

I am copper, purple and red, and brown and red with nitric acid;

I am arsenic, dark in color, and the trivalent element takes your soul;

I am bromine, volatile and smelly, and the liquid non-gold I come to show;

I am rubidium, alkali metal, dipping water fireworks potassium is not as good;

I am iodine, sublimated smoke, encountering starch blue spots;

I am cesium, golden yellow, into the water ** container broken;

I'm tungsten, high temperature, and other metals whine early;

I am golden, very stable, thrown into the king water shadow invisible;

I am mercury, highly toxic, and liquid metal is my own;

I am uranium, and after enrichment, I am the best at building atomic bombs;

I am gallium, which is easy to melt, and the boiling point is very high and difficult to evaporate;

I am indium, soft as gold, and careful with slight radiation;

I am thallium, can lose hair, poisoned and famous to see Tsinghua;

I am germanium, can be lattice, infrared window can be used as a shell;

I am selenium, tonifying the human body, and there is a mystery in the oral liquid;

I'm lead, I can store electricity, and I can also show up in bullets.

The formula of the third chemical element table:Learn the periodic table of elements: I am hydrogen, I am the lightest, and rockets rely on me to carry satellites; I'm helium, I'm a scoundrel, and I'm the best at gaining and losing electrons. I am lithium, which has a low density, and bubbles up when it encounters water and acid; I am beryllium, playing with the skin, although it is difficult to ionize metal.

I'm boron, a little red, and I'm poor when it comes to electrons; I am carbon, slow to react, able to form both chains and rings. I am nitrogen, I am flame retardant, and ammonia can be synthesized by hydrogenation; I'm oxygen, don't think about it, I'll be panicked when I leave.

I am fluorine, the most vicious, grab an electron and be satisfied; I'm neon, and it's not bad, and the red light is emitted when it's energized. I am sodium, I have a big temper, and when I encounter acid and water, I will be angry; I'm magnesium, I love beauty the most, and photography fireworks shine brightly. I am aluminum, at room temperature, in concentrated sulfuric acid to take a bath;

There are twenty-seven formulas for the third year of the chemical elements.

Hydrogen helium lipipeng tandanyanfunai nameijiakeqinshan

What is the mantra for memorizing the first 20 elements of the periodic table of chemical elements?

Periodic Table Memory Formula: Periodic Memory.

First Cycle: Hydrogen Helium - Invasion.

The second cycle: lithium, beryllium, boron, carbon, nitrogen, oxygen, fluorine, neon -- carp skin with carbon eggs to raise blessing milk.

The third cycle: sodium, magnesium, aluminum, silicon, phosphorus, sulfur, chlorine, argon -- the beautiful Guilin has green teeth (the beautiful ghost shows green teeth).

Fourth Cycle: Potassium, Calcium, Scandium, Titanium, Vanadium, Chromium, Manganese -- Counter-Revolution of Kang Tai.

The first 20 elements are best memorized in five or five, and you will be familiar with them when you read more.

Maybe less than 30.

1 hydrogen h is the lightest gas.

2 helium noble gases.

6 C2 is the most abundant gas in the air of the constituent elements of diamond and carbon, 7 nitrogen n, and 10 neon noble gases.

11 sodium Na12 mg mg

13 Aluminum AI14 Silicon Si

15 phosphorus p phosphate fertilizer.

16 Sulfur S17 Chlorine CI and Na are composed of Naci, which is table salt, 18 Argon argon is a noble gas.

19K The most reactive metallic element known.

20 calcium, Ca26, iron, Fe

29 copper Cu30 zinc Zn

56 barium ba

That's about that.