What was the first table in chemistry called? What is the table of chemistry, what is it, to memoriz

There is a periodic table of inorganic chemistry.

In the periodic table, the first 20 elements are required to be memorized in junior high school, and the first 36 elements are required to be memorized in high school. Combined with the specific main group, the first main group, hydrogen, lithium, sodium, potassium, rubidium, cesium, francium, the second main group, beryllium, magnesium, calcium, strontium, barium, radium, the third main group, boron, aluminum, gallium, indium, thallium, the fourth main group, carbon, silicon, germanium, tin, lead, the fifth main group, nitrogen, phosphorus, arsenic, antimony, bismuth, the sixth main group, oxygen, sulfur, selenium, tellurium, polonium, the seventh main group, fluorochlorobromo, iodine, astatine, plus group zero, noble gas group, helium, neon, argon, krypton, xenon radon, and it's OK.

Periodic table? This must be memorized, it is best to write it out silently and draw it!

Five five back is a matter of early reading, and there are more ion reaction tables, and there is a long way to go, classmates.

It means that cyanide, the chemical properties are very similar to halogens, it is highly toxic, and it is fatal!

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Multiply by 16% = 8kg. A and defend the forest to call the acres of stove dust. Answer.

Valence: Monovalent stove Zheng please donkey feet to take silver, (monovalent hydrochloride potassium sodium silver) bivalent sheep cover Mei vest. (Divalent oxygen, calcium, magnesium, barium, zinc) Monovalent potassium, sodium, hydrochloride, silver, bivalent local argument, calcium oxygen, barium, magnesium, zinc, trialuminum, tetrasilicon, pentavalent phosphorus, ditriferric, di-carbon, 1-5 valent, nitrogen, copper, mercury, bivalent, the most common positive copper, potassium potassium, sodium silver, positive 245, magnesium, barium, zinc, 3 aluminum, 4 silicon, 46 sulfur, 245 nitrogen, 35 phosphorus, 157 chlorochloro23, iron, 2467, manganese is positive, carbon has positive four and positive two, and then keep the negative valence in mind negative 1, bromo, iodine and fluorochlorofluorocarbon, negative dioxysulfur, triazonium, phosphorus, common prototung limb subgroup, valence oral decision:

Negative hydroxide nitrate, negative disulfite carbonate, and negative triphosphate, only ammonium is positive one, this is very easy to use!! You might as well give it a try, if you want to score points in chemistry.

According to the law of conservation of mass, x=9

The mass ratio of A and D is 9:8

The fact that the quality of C does not change means that it does not participate in the reaction or catalyst.

Phenomenon: Violent reaction, bubbles are generated. Phenomenon: Bubbles are generated.

First tube: slightly warm. Second tube: no change.

The first experiment: at room temperature, it is difficult for mg to react with water, and mg reacts violently with hydrochloric acid to produce hydrogen.

Chemical equation: Mg+2HCl=mgCl2+H2 The second experiment: MNO2 is used as a catalyst to catalyze the decomposition of H2O2 and produce oxygen.

Chemical equation: 2H2O2 2H2O+O2