What s the trick to remembering the periodic table? Those letters are a bit hard to remember.

First Cycle: Hydrogen Helium - Invasion.

The second cycle: lithium, beryllium, boron, carbon, nitrogen, oxygen, fluorine, neon -- carp skin holding carbon, eggs and 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 -- marrying Kangtai counter-revolutionary, iron, cobalt, nickel, copper, zinc, gallium, germanium -- iron, pinching, arsenic, selenium, bromine, krypton -- anger, shock.

Fifth cycle: rubidium, strontium, yttrium, zirconium, niobium -- so tell you molybdenum, technetium, ruthenium -- unbelievable.

Rhodium, palladium, silver, cadmium, indium, tin, antimony, --Laojiao, Yinge, Tellurium, iodine, xenon, --Location immortal.

Sixth cycle: cesium, barium, lanthanum, hafnium--color), color shell (shell), blue (color), river tantalum, tungsten, rhenium, osmium -- but (see) black (crow) (lead) goose iridium, platinum, gold, mercury, stone, lead, -- a white towel for it to hold bismuth, polonium, astatine, radon -- will not love winter (day).

The seventh cycle: francium, radium, actinium -- lightning protection!

Solubility formula.

Potassium sodium ammonium salt soluble (potassium salt, sodium salt, ammonium salt are soluble in water and acid).

Nitrate is the same (nitrate is the same as above).

There are four types of potassium, sodium, calcium and barium (potassium hydroxide, sodium hydroxide, calcium hydroxide, barium hydroxide) soluble alkali (the above four are soluble bases).

Chlorine except mercury (hydrochloride is soluble except mercury).

Sulfuric acid except lead barium (sulfate is soluble except lead and barium).

Please note that in the solubility formula, the so-called dissolution range is only applicable within the scope of middle and high school textbooks, and there are also some potassium, sodium, ammonium salts, nitrates, chlorides, sulfates that are insoluble and not in the formula, in addition to the above four bases, there are also other soluble hydroxides. I memorize a few every day, and I will become familiar with it over time.

You don't need to write them all down, the element symbols, remember the top 20 digits, and that's fine. If you have elements of the same family, there are only seven groups, plus rare gases, and you can record them separately. Remember.

5 5 notes, read it a few more times.

Oxygen raises it for nothing and chubby so it is.

The first 20 alphabets of the periodic table are as follows:

The first 20 names and symbols of the periodic table of chemical elements are 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), phosphorus (P), sulfur (S), chlorine (Cl), argon (Ar), potassium (K), and calcium (Ca).

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

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

I am lithium, with low density, and it bubbles up when it encounters water and land;

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

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

I am carbon, the reaction is slow, that is, it can form a chain and a ring;

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 I'm not bad, and the red light is emitted when the electricity is turned on;

I am sodium, I have a big temper, and I am slow when I encounter acid and water, and I am fired;

I am 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 am 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 am sulfur, I have a long history, and I am the best at precipitating metals;

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

I am 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.

The chronological alphabet is described as follows:

h, he, li, be, b, (hydrogen, helium, lithium, beryllium, boron);

C, N, O, F, NE (carbon, nitrogen, oxygen, fluorine, neon);

Na, Mg, Al, Si, P, (sodium, magnesium, aluminum, silicon, phosphorus);

S, CLAR, K, CA, (SULFUR, CHLORINE, ARGON, POTASSIUM, CALCIUM);

SC, TI, V, CR, MN, (Scandium, Titanium, Vanadium, Chromium, Manganese);

Fe, Co, Ni, Cu, Zn, (Iron, Cobalt, Nickel, Copper, Zinc).

can be homophonic as: "Add a beautiful ruler group girl, zinc, iron, tin, lead and hydrogen, a total of 100 catties."

The rapid memory method of the periodic table of chemical elements is as follows:

1. The first cycle: "hydrogen helium", the memory method uses homophony to "infringe" memory.

2. The second cycle: lithium, beryllium, boron, carbon, nitrogen, oxyfluorine, neon. The memory method uses associative methods, and there is a person named "Li Pi, holding black charcoal and eggs, and he is still drinking milk after raising a fortune".

3. The third cycle: sodium, magnesium, aluminum, silicon, phosphorus, sulfur, chloride, argon. The memory method adopts the homophonic method, which translates as "the beauty belongs to you, willow green buds".

4. The fourth cycle: potassium, calcium, scandium, titanium, vanadium, manganese: homophonic pronunciation: "A reform is too counter-revolutionary"; Iron, cobalt, nickel, copper, zinc, gallium and germanium: homophonic reading: "Iron bone pinching pain new home". Arselenium bromide krypton: homophonic pronunciation as "angry shock".

5. The fifth cycle: rubidium, strontium, yttrium, zirconium, niobium: homophonic reading:

So high you"; Molybdenum, technetium, ruthenium: homophonic pronunciation: "mother's"; Rhodium, palladium, silver, cadmium, indium, tin, antimony:

The homonym reads: "Daddy Ying's song is thin and the skin is high"; Tellurium iodine xenon: homophonic pronunciation:

Location first". >6. The sixth cycle: cesium, barium, lanthanum, hafnium: homophonic pronunciation: "equipment blue ha"; Iridium platinum mercury lead: homophonic reading: "a white towel for him to lead"; Bismuth polonastatine radon: homophonic pronunciation: "the pen does not like to move".

7. The seventh cycle: francium and radium actinium: homophonic reading: "lightning protection".

The periodic table of elements is a list of chemical elements sorted from smallest to largest according to the number of nuclear charges of the elements. 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 being divided into seven primary groups, seven secondary groups, and 18 groups. 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.