What is the difference between polar and non polar? How to tell? 5

A polar bond is a covalent bond formed by two different atoms.

It is inappropriate to say that a non-polar bond is a covalent bond formed by two identical atoms, e.g. the C bond in CH3CF3 is obviously not a non-polar bond. It should be said as:

A covalent bond formed by two atoms of the same species with the same chemical environment is a non-polar bond. Then the polar bond includes not only the covalent bond formed by two different atoms, but also the covalent bond formed by two identical atoms with different chemical environments!

You mean covalent bonds?

1. Polar covalent bonds are covalent bonds composed of two atoms, and non-polar covalent bonds are covalent bonds composed of the same atoms.

2. Polar molecules are molecules whose positive and negative charge centers are not at the same point, and non-polar molecules are molecules where the positive and negative charge centers fall at the same point, and the structure of such molecules is usually geometrically symmetrical.

Whether the polarity depends on whether the charge center coincides, and the one that does not coincide is polarity, which is electrical to the external surface, and the non-polar is neutral to the external surface.

Think of it as the action of force. Equilibrium is non-graduality, and imbalance is polarity.

Learn to imagine space and also judge.

Simple judgment.

A polar valent bond is a chemical bond made up of two different atoms.

Just judge it that way.

A polar molecule is a molecule where the center of gravity of positive and negative charges is not at one point.

The difference between nonpolar and polar is due to the formation cause, the presence of covalent bonds, and the arrangement of atoms within the molecule, etc.

1. Causes.

Non-polar molecules, the charge distribution of the entire molecule is uniform and symmetrical. Polar molecules, the charge distribution of the whole sub-nude is uneven and asymmetrical.

2. The existence of covalent slow-burning hole bonds.

Non-polar molecules, non-polar bonds, or polar bonds. Polar molecules, polar bonds.

3. Arrangement of atoms within the molecule.

Non-polar molecule, symmetrical. Polar molecules, asymmetrical.

Characteristics of non-polar and polar each:

Polarity is asymmetry, and the forces acting in different directions produce polarity. Non-polarity is, of course, symmetrical, and the forces cancel each other out, so no polarity is non-polar.

Polar capacitance is the same as non-polar capacitance:

The principle is the same. This is because it is a capacitance itself, and it is all about the storage and release of electric charge. All of them have the characteristics of DC blocking, AC connection, and blocking low frequency, and are widely used in coupling, DC blocking, bypass, filtering, tuning, energy conversion and automatic control. <>

Here's how to identify them:

1. For ANBM type n=1 m>1 if a valency.

Equal to the number of main groups is non-polar. Such as: CH4, CCL4, SO3, PCL52, if the bond angle (or spatial structure) is known, the force analysis can be carried out.

A resultant force of 0 is a non-polar molecule.

Such as: CO2, C2H4, BF3

3. Diatomic molecules composed of the same kind of atoms are non-polar molecules.

4. When the absolute value of the valency of the central atom.

When equal to the number of valence electrons of the element, the molecule is non-polar; Otherwise, it is a polar molecule.

5. Covalent bonds.

According to the synthesis and decomposition of the force, see whether the force on the central atom is balanced, if the equilibrium is a non-polar molecule; Otherwise, it is a polar molecule.

Note: Polar molecules: the positive and negative centers do not coincide, and the vector sum of the bonds is not 0.

Non-polar molecules: The positive and negative centers coincide, and the vector sum of the bonds is 0.

Distinction: 1. For ANBM type n=1 m>1 If the valency of a is equal to the number of main groups, it is non-polar.

2. If the bond angle (or spatial structure) is known, the force analysis can be carried out, and the resultant force is 0 for non-polar molecules. bf3。

3. Diatomic molecules composed of the same kind of atoms are non-polar molecules.

4. When the absolute value of the valency of the central atom is equal to the number of valence electrons of the element, the molecule is a non-polar molecule; Otherwise, it is a polar molecule.

5. Covalent bonds are regarded as forces, and different covalent bonds are regarded as unequal forces, according to the synthesis and decomposition of forces, see whether the central atom is balanced by force, and if equilibrium, it is a non-polar molecule; Otherwise, it is a polar molecule.

How to distinguish between polar and non-polar? Here's how: A covalent bond formed by atoms of the same element is a non-polar bond.

For example, elemental molecules such as hydrogen, oxygen and other sub-compounds (such as sodium peroxide, calcium dichloride, etc.) contain non-polar bonds. (2) Polar bonds: Different atoms form covalent bonds, and the charges of the common electron pairs in the molecule are asymmetrically distributed due to the different abilities of different atoms to attract electrons.

Such covalent bonds are called polar bonds. Judgment method: Covalent bonds formed by atoms of different elements are generally polar bonds.

Such as HCl, carbon dioxide, methane, hydroxide ions, etc., all contain polar bonds.

Difference Between Non-Polar Molecule and Polar Molecule.

1. Causes.

Non-polar molecules, the charge distribution of the entire molecule is uniform and symmetrical.

Polar molecules: The charge distribution of the whole molecule is uneven and asymmetrical.

2. Covalent bonds that exist.

Non-polar molecules, non-polar bonds, or polar bonds.

Polar molecules, polar bonds.

3. Arrangement of atoms within the molecule.

Non-polar molecule, symmetrical.

Polar molecules, asymmetrical.

The covalent bond formed between the atoms of the same element, which shares electron pairs in the middle of the two atoms forming the bond, does not deflect to either side, this kind of covalent bond is called a non-polar bond.

The bonds formed between the atoms of different elements are polar bonds. The shared electron pair is biased towards the side of the strong non-metallic atom, and this kind of partial positive and negative charge is called a polar bond.

Polarity is that the centers of bonding atoms do not coincide, and non-polarity is that the centers of bonding atoms coincide.

A non-polar molecule is one in which the charge is evenly distributed and symmetrical throughout the molecule. A polar molecule is a charge distribution that is uneven and asymmetrical throughout the molecule.

Polarity refers to the non-uniformity of the charge distribution in a covalent bond or a covalent molecule. If the charge is not evenly distributed, the bond or molecule is said to be polar; If it is homogeneous, it is said to be non-polar.

The polarity of the bond is due to the different electronegativity of the bonding atoms. When the electronegativity of bonded atoms is the same or similar, the dense region of electron cloud between the nuclei is near the middle of the two nuclei, and the center of gravity of the positive charge formed by the positive charge of the two nuclei and the center of gravity of the negative charge of the bonded electron pair almost coincide, and such a covalent bond is called a nonpolar covalent bond.

Molecular polarity: A covalent molecule is polar, which means that the charge distribution within the molecule is not uniform, or that the positive and negative charge centers do not coincide. The polarity of a molecule depends on the polarity of the individual bonds within the molecule and how they are arranged.

In most cases, polar molecules contain polar bonds, and non-polar molecules contain non-polar bonds or polar bonds.

However, non-polar molecules can also be made up entirely of polar bonds. As long as the molecule is highly symmetrical, the positive and negative charge centers of each polar bond are concentrated in the geometric center of the molecule, so that the polarity of the molecule is eliminated. Such molecules are generally linear, triangular, or tetrahedral in shape.

Polarity affects the solubility of the substance and the melting and boiling point of the residual mass.

1. Solubility.

The polarity of the distribution of oranges has a great influence on the solubility of the substance. Polar molecules are soluble in polar solvents, and non-polar molecules are soluble in non-polar solvents, i.e., "similar miscibility". Polar molecules such as sucrose, ammonia, and ionic compounds such as sodium chloride are easily soluble in water.

The components of organic matter with long carbon chains, such as oils and oils, are mostly insoluble in water, but soluble in non-polar organic solvents. <>

2. Melting and boiling point.

With the same molecular weight, polar molecules have a higher boiling point than non-polar molecules. This is because the orientation forces between polar molecules are greater than the dispersion forces between non-polar code-destroying molecules.

Non-polar and polar marketable can be judged by valence method and force analysis.

1. Valency method.

The composition is an ABN-type compound, and if the valency of the central atom A is equal to the ordinal number of the group, the compound is a non-polar molecule.

2. Force analysis method.

If the bond angle or spatial structure is known, the force analysis can be performed, and the resultant force of 0 is a non-polar molecule.

The polarity of a bond is different from the polarity of a molecule:

It is two concepts that are not identical, and there is both a connection and a difference between a polar bond and a polar molecule. Polar molecules must contain polar bonds, i.e., polar bonds are necessary for the formation of polar molecules, and may also contain non-polar bonds. A molecule containing a polar bond is not necessarily a polar molecule, i.e., a polar molecule not only contains polar bonds but also has an asymmetrical molecular structure.

If all the bonds in the molecule are non-polar, such a molecule is generally non-polar.

Generally, it can be judged from the structure and solubility: the polarity of the substance with the exposed hydroxyl group, the exposed carboxyl group, and the exposed amino group may be very large, and then the solubility experiment, the polarity of the solvent is generally consistent with the polarity of the substance. If the point is very condensed, then the polarity of the substance may be higher than that of the solvent, and with the diffusion of the solvent then the polarity may be lower.

Depending on whether the center of gravity of the positive and negative charges in the molecule can coincide.

For covalent compounds, we should judge the polarity of the molecule according to whether the center of gravity of the positive and negative charges in the molecule can coincide: if it can coincide, it is a non-polar molecule, and if it cannot coincide, it is a polar molecule.

Chemical properties of polarity:

In chemistry, polarity refers to the inhomogeneity of the charge distribution in a covalent bond or a covalent molecule, if the charge is unevenly distributed, then the bond or molecule is said to be polar, if it is uniform, it is called non-polar, some physical properties of the substance (such as solubility, boiling point, etc.) are related to the polarity of the molecule.

Polarity is the object exhibiting opposite intrinsic properties or forces in opposite parts or directions, the direction or belief attraction to a particular thing (e.g., tilting, feeling reeds, or thoughts), the tendency or tendency to a particular direction, and the specific positive or negative state of an electrode or electricity (e.g., an object).

Objects exhibit opposite intrinsic properties or forces in opposite parts or directions.

Direction or attraction to a particular thing (such as emotions, feelings, or thoughts), inclination or tendency to a particular direction.

Specific positive and negative states for poles and points (e.g., of an object). <>