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Chemistry One-Liners for various competitive examinations
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Here are some important Chemistry one-liners for students competing for various exams
Watch some of the important Chemistry Bits below.
1- The force of attraction that keeps the various atoms of a molecule together is called Chemical bond.
2-Bond formed by the transfer(loss or gain) of electrons is called the electrovalent bond.
3- A bond formed by the sharing of electron pairs between atoms is called the covalent bond.
4-Three major types of Chemical bonds are there. They are Ionic, Covalent and Co-ordinate covalent(dative).
5-Ionic bond was proposed by Kossel.
6-Ionic bond is formed by the transfer of electrons between atoms.
7-The bond formed between highly electropositive and highly electronegative elements is an ionic bond.
8- The electrostatic force of attraction existing between oppositely charged ions is called the ionic bond.
9- The ionic bond is always formed between a metal and a non-metal.
10-The formation of a covalent bond was initially explained by Lewis.
11- The number of electron pairs shared by an atom with others is called its covalency.
12-The term Covalency was introduced by Langmuir.
13- When two electron pairs are shared between two atoms, the bond formed is called a double covalent bond.
14- If three electron pairs are shared between two atoms, the bond formed is called a triple covalent bond.
15- A nonpolar covalent bond is formed in between similar atoms.
16- A polar covalent bond is formed in between dissimilar atoms.
17- Majority of covalent compounds are gases or volatile liquids or solids of low melting points.
18- Generally covalent bond is weaker than an ionic bond.
19- Covalent compounds are soluble in non-polar solvents like benzene, Chloroform etc and insoluble in polar solvents.
20- Covalent compounds do not conduct electricity.
21- Co-ordinate Covalent bond was proposed by Sidgewick.
22-The atom that provides an electron pair is called donor and which receives it is called acceptor. Hence the bond is also called donor-acceptor bond.
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