POINTS TO REMEMER-Class 10 – Science -Chemistry -Chapter 1 – Chemical Reaction and Equation

POINTS TO REMEMER-Class 10 – Science -Chemistry -Chapter 1 – Chemical Reaction and Equation

POINT TO REMEMER  

➢A chemical bond is the force of attraction which holds together the atoms in a molecule. 

➢ An electrovalent bond is formed as a result of complete transfer of electron(s) from one atom to another. 

➢  Atoms which can lose electrons and form positive ions are said to be electropositive. 

➢ Atoms which can gain electrons and form negative ions are said to be electronegative. 

➢ The total number of electrons lost or gained by an atom to attain the stable configuration of the nearest noble gas is known as the valency of the atom. 

 ➢ The number of electrovalent bonds by an atom can form is called its electrovalency. 

➢ Covalent bonds are formed by the mutual sharing of electrons between the combining atoms. 

 ➢ Compounds containing covalent bonds are called covalent compounds.

 ➢ The. total number of electrons shared by a given atom in the formation of covalent bonds to attain the stable configuration of its nearest noble gas is known as its covalency. 

➢ The force that holds the atoms closely together in a metal is known as the metallic bond.