The theme of the lesson:
Chemical bonds
Learning objectives:
• What is it?
• How is it formed?
• How to classify?
When the electronegativities of two atoms
are quite different from each other:
One atom loses an electron (or electrons)
The other atom gains an electron (or
electrons)
This results in an Ionic Bond.
NaCl
Crystal Lattice
metal + nonmetal
+ 11 Na)2)8) 1
+ 17 Cl)2)8)
Electrostatic attraction
7
Covalent coupling is a connection that arises
between atoms due to the formation of
common electronic pairs
By the degree of bias of common
electronic pairs to one of the atoms bound
by them, the covalent bond can be polar
and nonpolar
Covalent nonpolar connection (CNS) - form atoms of
the same chemical element - non-metal (For example:
H2, O2, O3).
Covalent Polar Communication (KPS) - form atoms of
different non-metals, differing in the values ​of
electronegativity (For example: HCl, H2O).
Metal bond
It is a relationship in metals and alloys
which are relatively free electrons between
the metal ions in the metal crystal lattice
Diagram metallic bond
M° - nē ↔Mⁿ