The chemical classification of people who often close the problem of what are

Agree, there are people who often ask questions, and after others, they have answers to choose from (which often take a lot of time and effort from the answerer), but they close the question without choosing them, and strongly despise these people!! Find out these people**, and everyone should not go to these people's problems in the future, so as not to waste time and energy.

Of course, there are some clear answers that there are no options for closing the question, and that's understandable.

The example is me.。。

One. Didn't get the answer I thought was right, time expired, and I chose to close.

The purpose is not to misunderstand the people who look at this issue. It can be guaranteed that the person who sees the problem will not get a wrong understanding.

Two. It can be difficult to find a more suitable answer among the many unsatisfactory answers.

Three. I didn't get a good answer, I paid a lot of points, and my heart hurts. That can't be given to those who mess around.

The issue I closed :

The total number of issues that were withdrawn was 6. But right now I only have 4 closed questions in my question. Probably 2 more were deleted by me. I'm sorry.

I've done it a few times, mostly with a number of 0 (and some I'm really not satisfied), but most of them will be dealt with.

A friend once borrowed my computer to ask a question, and since I am a rookie, I was shut down by the system, so I'm embarrassed.

Top, I used the phone inconveniently, apologized, left.

Don't close it when you get there, look forward to it

The landlord's statement is wrong, the molecular formula of white phosphorus is P4, and the molecular formula of sulfur is S8, S6, S4, S2, S and so on, which cannot be simply called monoatomic molecules, and they are written as P and S are just abbreviations and do not represent their true structure. Diamond is a giant atomic crystal formed by covalent bonds of many carbon atoms to each other, and can be seen as a direct composition of atoms. Iron is a giant metal crystal made of many iron atoms connected to each other by metallic bonds, and because there are a large number of free electrons in the metal crystal, iron can conduct electricity, but it is not strict enough to think of iron as being made directly from atoms (you can say this in middle school, but not in college).

Only noble gases can be called monoatomic molecules. The reason why various substances are classified in this way is because of their different types of chemical bonds, and if you go deeper, the reasons are more complex, and are related to the ionization potential, electron affinity potential, atomic radius and other factors of each element.

Atoms are generally regarded as particles that exist in a free state, such as H, O, etc., and each noble gas molecule can also be regarded as an atom, so the concept of atoms has a wide range. Monoatomic molecules generally refer to noble gases, and only the molecules of noble gases can be regarded as atoms at the same time, because they are in fact single atoms that do not bond with each other.

Remember: monoatomic molecules are the prerogative of noble gases. Other substances are simply abbreviated as p, s, etc., and from the point of view of the material structure, they are still molecules, but they are giant molecules, and because it is impossible to determine how many chemical bonds there are, they are abbreviated.

1.Nitric acid is refractory to volatile.

2.Nitric acid is made up of three elements, so it's not an element, it's a compound.

3.A small amount of hydrogen ions, hydroxide ions, and ferric ions (Fe(OH)3 colloids) will be decomposed in the colloid

The difference between solution and colloid is that all the solute in the solution is ionized and decomposed, while the solute decomposition of colloidal body reaches saturation, and the remaining part of the solute exists in the solution in a non-ionic form and is suspended in the solution through adsorption.

In addition, wherever there is liquid water, there must be hydrogen ions and hydroxide ions.

4.The worst fertilizer efficiency is definitely the lowest nitrogen content, and you can see which of the concentrated compounds has the lowest nitrogen content.

5.At present, there are no elemental acids, acids are compounds, and the first thing to know is the definition of compounds.

Compounds: Pure substances composed of two or more elements are called compounds.

6.Sodium chloride is soluble in water and insoluble in organic solvents, so the state of sodium chloride in gasoline is the same as the state of sand in water, which is a suspension.

7.quicklime cao and aquatic mature lime ca(oh)2

Quicklime Water Carbon dioxide When carbon dioxide is insufficient, calcium bicarbonate is formed, and when carbon dioxide is sufficient, calcium carbonate is generated.

Dizzy, don't adopt mine... Can I add a few more???

Ah, you have offended so many people at once, Amitabha!!

Here are a few more that meet all the criteria.

Number of closures: 167 Number of closures Number of questions asked = 52%.

Number of closures: 105 Number of closures Number of questions =

Number of closures: 188 Number of closures Number of questions asked = 52%.

Number of closures: 122 Number of closures Number of questions asked = 55%.

Number of closures: 243 Number of closures Number of questions asked = 67%.

Number of closures: 167 Number of closures Number of questions asked=

Number of closures: 103 Number of closures Number of questions asked = 54%.

Number of closures: 61 Number of closures Number of questions asked =

Number of closures: 55 Number of closures Number of questions asked =

Number of closures: 51 Number of closures Number of questions asked = 76%.

Number of closures: 83 Number of closures Number of questions asked = 67%.

Number of closures: 93 Number of closures Number of questions asked =

Number of closures: 188 Number of closures Number of questions asked = 93%.

Let's give a few more links.

Number of closures: 88 Number of closures Number of questions asked =

Number of closures: 50 Number of closures Number of questions asked =

Number of closures: 62 Number of closures Number of questions asked = 71%.

Number of closures: 71 Number of closures Number of questions asked = 100%.

Number of closures: 67 Number of closures Number of questions asked = 60%.

Number of closures: 62 Number of closures Number of questions asked =

Many times the system shuts down automatically. The reason is that after the question was raised, the questioner was not selected in time, and there was only one answer to the reply, so it was impossible to initiate a vote.

Nitty conditions are hard to meet.

In fact, there are many people who don't close after asking, but don't deal with it after getting the answer, and register a new number next time to continue asking, so it's difficult to find users who meet your conditions.

Halo: I'm sorry

Number of closures: 167 Number of closures Number of questions asked = 52%.

Number of closures: 105 Number of closures Number of questions =

Number of closures: 188 Number of closures Number of questions asked = 52%.

Number of closures: 122 Number of closures Number of questions asked = 55%.

Number of closures: 243 Number of closures Number of questions asked = 67%.

Number of closures: 167 Number of closures Number of questions asked=

Number of closures: 103 Number of closures Number of questions asked = 54%.

Number of closures: 61 Number of closures Number of questions asked =

Number of closures: 55 Number of closures Number of questions asked =

Number of closures: 51 Number of closures Number of questions asked = 76%.

Number of closures: 83 Number of closures Number of questions asked = 67%.

Number of closures: 93 Number of closures Number of questions asked =

Number of closures: 188 Number of closures Number of questions asked = 93%.

Let's give a few more links.

Number of closures: 88 Number of closures Number of questions asked =

Number of closures: 50 Number of closures Number of questions asked =

Number of closures: 62 Number of closures Number of questions asked = 71%.

Number of closures: 71 Number of closures Number of questions asked = 100%.

Number of closures: 67 Number of closures Number of questions asked = 60%.

Number of closures: 62 Number of closures Number of questions asked =

Damn, and 100% off, speechless.

Despise that kind of person.

This question is a means.

LZ has your back.

I haven't come across it yet. Most of them are more generous.

Shattered Starry Sky Rain has been adopted.

This time the 200 points chance is left to someone else.

We hope you will provide a lot.

A lot of them, I don't remember the name.

The substance is divided into (1) pure substances and (2) mixtures. In pure matter, it is divided into (a) inorganic matter (b) organic matter; In inorganic matter, it is divided into (1) elemental (2) compounds; In elemental matter, it is divided into metal element and non-metal element; In the compound, it is divided into () oxide () acid () base () salt; In oxides, it is divided into metal oxides and non-metal oxides or acid oxides, basic oxides, non-salt oxides, peroxides, superoxides, and amphoteric oxides; In acids, it is divided into strong acids, weak acids, volatile acids, and insoluble acids; In alkali, it is divided into strong alkali, weak alkali, soluble alkali and insoluble alkali; In salt, it is divided into normal salt, acid salt, alkaline salt, soluble salt, insoluble salt, ammonium salt, sulfate, nitrate, sodium salt, potassium salt, etc.; In organic matter, hydrocarbons, derivatives of hydrocarbons, oils, sugars, proteins, polymer compounds, etc. are separated. In the derivatives of hydrocarbons, halogenated hydrocarbons, alcohols, ethers, aldehydes, organic acids, esters, nitro compounds, amines, and amides are further divided; In hydrocarbons, chain hydrocarbons, cyclic hydrocarbons, unsaturated hydrocarbons, saturated hydrocarbons, and so on are further divided.

According to the contribution to living organisms, it can be divided into organic and inorganic.

According to the molecular composition of the substance, it can be divided into elemental and compound.

Elemental substances can be divided into metals, non-metals and noble gases; There are two ways to classify compounds, one is acid-base salts, and the other is electrolytes or non-electrolytes.

Inorganic, organic.

Mixtures, pure substances (elemental, compounds).

Metallic, non-metallic.

Inorganic, organic.

Mixtures, pure substances (elemental, compounds).

Metallic, non-metallic.

Solids, liquids, gases.

Mixtures

Elemental compounds

Other compounds 、、、

……Upstairs, the wrong lime water is an aqueous solution of hydrated lime Ca(OH)2, is the mixture good or not.

Mixture 1, 8 Elemental 2, 3, 6 Compound 4, 5, 7 Oxide 4, 7 Other Compound 5

For this other compound I don't understand, and doubt ==

Mixtures, elemental compounds, oxides, other compounds5

Chemistry is one of the important basic sciences, which has developed rapidly in the interpenetration with physics, biology, astronomy and other disciplines, and has also promoted the development of other disciplines and technologies. For example, the results of nucleic acid chemistry have raised today's biology from the cellular level to the molecular level, establishing molecular biology; The analysis of the chemical composition of the Earth, the Moon and other stars has led to the law of the distribution of elements, the discovery of simplifications and the existence of matter in interstellar space, the provision of experimental data for the evolution of celestial bodies and modern cosmology, and the enrichment of the dialectics of nature.

According to the development of the discipline of chemistry today and its interpenetration with astronomy, physics, mathematics, biology, medicine, geoscience and other disciplines.

Inorganic chemistry. Elemental Chemistry.

Inorganic Synthetic Chemistry.

Coordination Chemistry Coordination Polymer Chemistry.

Inorganic Solid State Chemistry.

Organometallic Chemistry.

Bioinorganic Chemistry.

Organic chemistry. Natural Organic Chemistry.

General Organic Chemistry.

Organic Synthetic Chemistry.

Metallic and non-metallic organic chemistry.

Physical Organic Chemistry.

Bioorganic Chemistry.

Organic Analytical Chemistry.

Physical chemistry. Chemical thermodynamics.

Structural Chemistry. Chemical kinetics.

Separate physicochemistry.

Analytical chemistry. Qualitative analysis.

Quantitative analysis instrumental analysis.

Electrochemical analysis.

Optical analysis Radiochemical analysis.

Structural analysis functional group analysis.

Stereochemical analysis.

Polymer Chemistry.

Natural Polymer Chemistry.

Polymer Synthetic Chemistry.

Polymer Physical Chemistry.

Polymer applications.

Polymer Physics.

Nuclear Chemistry, Nuclear Radiochemistry.

Radioactive Element Chemistry.

Radioanalytical Chemistry.

Radiation Chemistry. Isotope Chemistry.

Nuclear chemistry. Biochemistry.

General Biochemistry.

Enzymes. Microbial Chemistry.

Phytochemistry. Immunochemistry.

Fermentation and bioengineering.

Food Chemistry. Other marginal disciplines related to chemistry.

Geochemistry. Marine Chemistry.

Atmospheric Chemistry. Environmental Chemistry.

Cosmochemistry. Interstellar Chemistry.

I think that girls should go to school, and the education category is chemistry.

Chemistry is still harmful to the human body, but if you like to study biology and chemistry, it's okay.

Medicine, Biology, Materials, Physics, Ecology, Environment, Agriculture, Engineering, Construction, etc., etc.

Philosophy. Mathematics.

Medicine. Management.

Literature. Geography.

Physics. Politics.

Educate. Astronomy.

Biochemistry. Physics. Economics.

Environment. Earth science.

English, Politics, Geography, Medicine, Biology, Materials, Physics, Ecology, Environment, Agriculture, Engineering, Construction, Information.

Mathematics is the most important, and mathematics and physics are not separated.

If you agree with me, please click the [Satisfied] button in time The mobile phone questioner can comment on [Satisfied] in the upper right corner of the client.

Yours is my motivation to move forward

If there is a new Jingji Silver Question Liang Banquet Question, please do not send it in the form of a follow-up question, send another question and ask me for help or send a question link address at the follow-up question, it is not easy to answer the question, please understand

o( state orange )o, remember the praise and, help each other.

Good luck with your studies!