2 Chemical Bonding
No description yet. This curated deck is ready for daily study.
Card preview (24)
What is a Chemical Bond?
The linkage or force which acts between 2 or more atoms to hold them together as a stable molecule.
Molecule is formed by the combination of
2 or more atoms
The concept of chemical bond is
Chemical Bonding
Reasons for chemical bonding between atoms:
The tendency of atoms to attain stable electronic configuration of the nearest noble gas.
2 Rules of stability
Octet rule and Duplet rule
2 methods of achieving chemical bonding
• Electron transfer 2. Electron sharing
Effect on the ease of formation of ionic compound with respect to: • IP • EA • EN
• Inversely -> Cation • Direct (Note: EA is only represented by -ve sign-> here absolute value is taken). -> Anion • EN difference should be large.
Effect on the ease of formation of Covalent compound with respect to: • IP • EA • EN
All the values should be high. EN difference should be negligible.
Ionic Bond formation is due to _____.
Electrostatic force of electrostatic force of attraction between the ions.
Electrovalency
Number of electrons donated or accepted by the valence shell of an atom of an element.
____ may or may not exist independently. But ______ exist independently in solution.
Atoms; Ions;
In oxidation, there is _____ in electrons or ____ in hydrogen or ______ in oxygen
Lose; Lose; Gain;
In reduction, there is _____ in electrons or ____ in hydrogen or ______ in oxygen
Gain; Gain; Lose;
Ionic equation should have
Reduction and Oxidation equations
Electrovalent compounds involves ______ and ______. Covalent compounds involve _____ and _______.
Metal and Non-Metal. Non-Metal and Non-Metal.
Number of bonds of each type is based on
the valency of the atoms
Covalent compound
Chemical bond formed due to the mutual sharing of electrons. Between non-metallic elements
Covalency
Number of electron pairs which an atom shares with one or more atom of the same or different kind to achieve stable electronic configuration.
Non polar
• Shared pair of electrons are equally distributed between the 2 atoms. • No charge seperation. • Electrically neutral
Which type of bond has absolute symmetry?
Non-Polar covalent bonds
Polar
• Shared pair of electrons are unequally distributed between the 2 atoms. • Charge seperation takes plalce. • High electronegative -> slight negative charge.
If out of 2 atoms, one atom contributes x electrons. Then the bond is ____.
x covalent bond.
____ electrons in the outershell of each nitrogen atom are not involved in sharing during the formation of N2 molecules.
2
CCl4 has ____ single covalent bonds.
4