Concept of ionic compounds What substances are ionic compounds

A compound made up of cations and anions. When active metals (such as sodium, potassium, calcium, magnesium, etc.) and active nonmetals (such as fluorine, chlorine, oxygen, sulfur, etc.) are combined with each other, the active metals lose electrons to form positively charged cations (such as Na+, K+, Ca2+, Mg2+, etc.), and active nonmetals obtain electrons to form negatively charged anions (such as F-, Cl-, O2-, S2-, etc.), and cations and anions form ionic compounds by electrostatic action. For example, sodium chloride is an ionic compound composed of positively charged sodium ions (Na+) and negatively charged chloride ions (Cl-).

In ionic compounds, the total number of positive charges carried by cations is equal to the total number of negative charges carried by anions, and the whole compound is electrically neutral.

Ionic compounds are compounds that contain many anions and cations. Or compounds that contain ionic bonds.

In chemistry, it is more common to be composed of active metal cations (including ammonium ions) and active non-metal anions (which can also be oxygenate ions, such as carbonate ions, hydroxide ions, sulfate ions, etc.).

Ionic compounds are generally substances whose chemical formulas can be split into anions and cations when writing.

Strong. Alkali. Soluble salts. Strong electrolytes are ionic compounds.

One more statement. Soluble metal compounds or non-metal compounds are generally ionic compounds. Because the metals and non-metals in these substances are very lively.

That is, more than 50% of the ionic composition of the chemical bond is considered to be an ionic compound, and experience shows that when the absolute value of the electronegativity difference of the element is greater than the ionic compound, it can be considered to be able to form ionic compounds;

The chemical bonds of compounds such as CSF are only 92%, that is to say, there is still 8% covalentity, that is, the cation does not completely lose electrons, but the probability of appearing around the anion is large;

Common ionic compounds include basic oxides, strong bases, metal oxides, metal peroxides, metal hydrides, most salts (oxygenates, ammonium salts, etc.).

When reactive metals (such as sodium, potassium, calcium, magnesium, etc.) and reactive non-metals (such as fluorine, chlorine, oxygen, sulfur, etc.) are combined with each other, reactive metals lose electrons to form positively charged cations, and reactive nonmetals obtain electrons to form negatively charged anions, and cations and anions form ionic compounds by electrostatic action.

Characteristics of ionic compounds:

Ionic compounds can conduct electricity in aqueous solution or in the molten state; Some covalent compounds can also conduct electricity in aqueous solutions, but there are also solid electrolytes that are conductive** to the migration of ions in the crystal lattice.

Under normal circumstances, most of them are crystals, their melting and boiling points are very high, they can conduct electricity when melting, some ionic compounds can be dissolved in water, and their aqueous solutions can also conduct electricity, in short, conductivity is their important feature.

Ionic compounds include sodium chloride (NaCl), ammonium nitrate (NH4NO3), potassium iodide (Ki), copper sulfate (CuSO4), calcium oxide (CAO), magnesium sulfate (MGSo4), calcium carbonate (CaCO3), etc.

1. Sodium chloride (NaCl): also known as table salt, is an umami additive widely used in food processing.

2. Ammonium nitrate (NH4NO3): It is a common nitrogen fertilizer that plays an important role in agricultural production.

3. Potassium iodide (ki): It is a common iodine agent, which can be used for diseases such as hyperthyroidism.

4. Copper sulfate (CuSO4): It is a commonly used experimental reagent for the detection of proteins, DNA and other biomolecules.

5. Calcium Oxide (CAO): Also known as quicklime, it is a chemical widely used in construction and agricultural production.

6. Magnesium sulfate (MGSO4): It is a commonly used magnesium agent, which can be used for muscle cramps, magnesium deficiency and other diseases.

7. Calcium carbonate (CaCO3): It is a compound with calcium as the main component, which is widely used in the manufacture of cement, ceramics and rubber products.

What is the off-source code compound made of.

Ionic compounds are made up of positively charged ions (cations on the stool of the anonym) and negatively charged ions (anions). These ions are attracted to each other by static electricity to form a stable crystalline network.

Cations are derived from metallic elements, which tend to lose one or more electrons to form positive ions; Anions, on the other hand, come from non-metallic elements, which tend to accept one or more electrons to form negative ions. When cations and anions are combined, they are able to form a stable material structure by electrostatic force.

1. Ionic compounds are compounds composed of anions (negatively charged) and cations (cations, positively charged) that are combined by ionic bonds that are essentially Coulomb forces.

2. Ionic compounds usually have high melting and boiling points, and can conduct electricity when melting or ionizing in an aqueous solution that produces their constituent ions. Most ionic compounds are solid at room temperature, but there are also some liquid ionic compounds present at room temperature, which are usually salts containing complex organic components.

3. Pay attention to the difference between liquid ionic compounds and ionic compound solutions, the latter contains some non-electric molecules.

Detachable: strong acid, strong alkali, soluble salt.

Non-detachable: elemental, oxide, weak acid, weak alkali, insoluble salt, water.

Salts are compounds composed of metal cations and acid ions (ammonium does not belong to metal cations), and the main high acids are hydrochloric acid and sulfuric acid. There are mainly these two, which other teachers will talk about. It should be noted that sulfurous acid is a weak acid, and phosphoric acid is a ternary weak acid.

Sodium hydroxide is a strong alkali, note that calcium hydroxide cannot be dismantled when making lime milk. In particular, bicarbonate is a whole and cannot be split into carbonate and hydrogen ions, because carbonic acid is a weak acid.