How to distinguish between polar and non polar bonds, and how to make it easier to remember, thank y

The non-polarity of a chemical bond is relative to a covalent bond. Essentially, the polarity of a covalent bond depends on whether the shared electron pairs are shifted, and the covalent bond with the offset of the electron pair is a polar bond, and the covalent bond without the offset of the electron pair is a non-polar bond. Formally, in general, a covalent bond formed by atoms of the same element is a non-polar bond, and a covalent bond formed by atoms of different elements is a polar bond.

When learning the polarity judgment of covalent bonds, we must get rid of the misconception that "covalent bonds formed by atoms of the same element must be non-polar bonds".

For compounds, the covalent bonds formed between atoms of the same element in structurally symmetrical molecules such as the "C-C" bond in H3C-CH3, the "C=C" bond in CH2=CH2, and the "O-O" bond in Na2O2 are indeed non-polar bonds. However, the "C-C" bond in structurally asymmetrical molecules such as CH3CH2OH and CH3COOH is not a non-polar bond, but a polar bond.

For elemental substances, covalent bonds like those found in covalent elemental elements such as H2, O2, N2, P4, C60, diamond, graphite, etc., are indeed non-polar bonds. But the "O-O" bond in the O3 molecule is not a non-polar bond, but a polar bond. This is because the structure of the O3 molecule is "V" type (or angular type), and the bond length is exactly between the single bond bond length of the oxygen atom of 148 pm and the double bond length of 112 pm), which is similar to the structure of SO2, which can imitate SO2 and call O3 "oxygen dioxide", so the "O-O" bond in the O3 molecule is a polar bond, and its molecule is a polar molecule.

Generally speaking, the covalent bond formed by atoms of the same element is a non-polar bond, and the covalent bond formed by atoms of different elements is a polar bond. Just remember this.

Only one element symbol has a non-polar bond that has a corner mark that is not one.

Other polar covalent bonds.

Or draw a schematic diagram of the structure, the covalent bond is the same size at both ends is non-polar, and vice versa.

Whether there is polarity or not is to see if the two sides of the covalent bond are balanced.

The difference between polar bonds and non-polar bonds is as follows.

Polar bonds: Different kinds of atoms form covalent bonds, and due to the different abilities of different atoms to attract electrons, the charges of the common electron pairs in the molecule are asymmetrically distributed. Such covalent bonds are called polar bonds.

Non-polar bonds: The same kind of atoms form covalent bonds, the ability of two atoms to attract electrons is the same, the common electron pairs are not biased towards any one atom, and the charges are symmetrically distributed near the nuclei of the two atoms, so the bonded atoms are not electrically charged, such covalent bonds are called non-polar bonds.

Judgment method: Covalent bonds formed by atoms of different elements are generally polar bonds. Such as HC1, CO2, CC14, SO42-, OH-, etc., all contain polar bonds.

Formation conditions

It is not only possible to form polar covalent bonds between non-metallic elements, but also between metals and non-metals (such as AlCl3, BeCl2, etc.), generally speaking, as long as the electronegativity between two non-metallic atoms is different, and the gap is less than that, a polar bond is formed, and when it is greater than that, an ionic bond is formed.

There are 3 ways to determine whether a covalent bond is polar or non-polar:

If the bonding atom is an atom of the same element, a non-polar bond is formed, otherwise a polar bond is formed;

If the bonding electron pair is not biased towards a certain bonding atom, then a non-polar bond is formed, otherwise a polar bond is formed;

If the bonding atom is not electrically conductive, a non-polar bond is formed, otherwise a polar bond is formed.

Without considering the delocalization key and the coordination key, the method and method are basically equivalent.

The method cannot be used as a basis for judgment, because an atom can form multiple co-valence bonds with the same atom and different kinds of atoms at the same time, and a polar bond is formed between an atom and different kinds of atoms, thus showing electricality, and a non-polar bond is formed between the same atom, so the atom with electrical property can form a non-polar bond, that is, the method is wrong.

Summary. Hello, I'm glad you are judged to be polar and non-polar bonds are polar bonds and non-polar bonds refer to two different types of chemical bonds. A polar bond is a chemical bond in which there is a charge asymmetry between two atoms, while a non-polar bond is a chemical bond in which the charge is symmetrical between two atoms.

Polar bonds, also known as electronegative bonds, are chemical bonds formed by the sharing of electrons between atoms. For example, hydrogen bonding, there is only one electron in one hydrogen atom, and the other atom has a high electron density, so it can attract that electron and form a polar bond. There are also ionic bonds in acid-base reactions, for example, the acidity and alkaline strength of acids and bases in acid-base reactions determine the direction and degree of acid-base reactions.

Hello, I'm glad you are judged to be polar and non-polar bonds are polar bonds and non-polar bonds refer to two different types of chemical bonds. A polar bond is a chemical bond with a charge asymmetry between two atoms, while a non-polar bond is a chemical bond with symmetrical charge between two atoms. Polar bonds, also known as electronegative bonds, are chemical bonds formed by the sharing of electrons between atoms.

For example, hydrogen bonding, there is only one electron in one hydrogen atom, and the other atom has a high electron density, so it can attract that electron and form a polar orange stool bond. For example, the ionic bonds in acid-base reactions, the acidic and alkaline circular travel strength of acid-base in acid-base reactions determines the direction and degree of acid-base reactions.

Affinity Non-polar bonds are chemical bonds formed by electrons that share electrons with common differences between atoms. For example, carbon-sulfur bonds, carbon-hydrogen bonds, etc. This type of bond is a planar bond, they have no charge difference band, the charge is symmetrical between the atoms, and the surge bond formed does not have a charge difference band.

It is common to determine whether a bond is polar or non-polar by comparing the difference in atomic numbers of two atoms. If the atomic number difference between the two atoms is significant, the bond is most likely polar; Whereas, if the difference in atomic number of two atoms is smaller, then the bond is most likely non-polar.

Difference Between Polar Bond and Non-Polar Bond.

First of all, you should know that polar bonds and non-polar bonds belong to covalent bonds, first determine whether the bond is an ionic bond or a covalent bond, if it is a covalent bond, the two atoms that are regarded as bonds are not atoms of the same element, if it is the same element, it is a non-polar bond, if it is not an atom of the same element, then it is a polar bond!

Reason: Atoms of the same element have the same ability to attract the common electron pairs, so the shared electron pairs will not be offset, which is a non-polar bond; And if it is not an atom of the same element, then the ability to attract the common electron pair must be different, and the electron pair will inevitably be shifted, which is a polar bond).

Non-polar bonds are covalent bonds formed between the same elements, such as H-H bond in H2, O-O bond in H2O2, etc.

Polar bonds are covalent bonds formed between different elements, such as H-O bonds in H2O, H-O bonds in H2O2, etc.

Again: ch2=ch2 where c-h is a polar bond and c-c is a non-polar bond.

Polar bond: In compound molecules, due to the different ability of two atoms to attract electrons, the shared electrons must be biased towards the atom with the stronger ability to attract electrons, so the atom with the weaker ability to attract electrons is relatively positive, such a covalent bond is called a polar covalent bond, referred to as a polar bond.

Non-polar bonds: In molecules, the same kind of atoms form covalent bonds, and the two atoms have the same ability to attract electrons, and the shared electron pairs are not biased towards any one atom, so the bonded atoms are not electrical. Such covalent bonds are called non-polar covalent bonds, or non-polar bonds for short.

Differences: 1. Polar bond is a covalent bond formed by different atoms in the compound molecule, due to the different ability of two atoms to attract electrons, the shared electron pair must be biased towards the atom with the stronger ability to attract electrons, so the relative positivity of the atom with the weaker ability to attract electrons.

2. When the electrons are different to the atoms on both sides, the attraction to the electrons is different, which will make the electron pairs biased towards the atoms with high electronegativity. Polarity is formed. When an electron pairs an atom on both sides of the atom, the attraction to the electron is the same, and the electron does not favor which atom it is.

1. Central atom valency method: the composition is an ABN type compound, if the valency of the central atom A is equal to the 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 carried out, and the net force is 0 for non-polar molecules.

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

4. Polar bond: In the compound molecule, the covalent bond formed by different kinds of protologs, due to the different ability of two atoms to attract electrons, the shared electrons must be biased towards the atom with the stronger ability to attract electrons, so the relative electropositive of the atom with the weaker ability to attract electrons.