Chemical bonding Flashcards
___ is the force which holds two or more atoms together in a stable molecule
Chemical bond
Metallic elements have ___ electrons in their valence shell
1,2 or 3
Non metallic elements have __ electrons in their valence shell
5,6, or 7
Which elements have stable electronic configuration
Noble gases
How many electrons do noble gases have in their valence shell
2- Helium
8
Why does Chemical bonding happen
To attain stable electronic configuration of nearest noble gas
Octet rule
8 electrons in outermost shell
Duplet rule
2 electrons in outermost shell
Two methods to achieve chemical bonding
Electron transfer, electron sharing
Electron sharing results in formation of
Covalent compound
Electron transfer results in formation of ___
Electrovalent/Ionic compound
For formation of ionic compound, Value of I.P of metallic atom must be
Low
For formation of ionic compound , E.A of non metallic compound should be
High
For formation of ionic compound, Electronegativity difference should be____
Large
For formation of covalent compound, I.P, E,A and electronegativity must be ___ between both atoms and E.N difference must be ____
High , negligible
Transfer of electrons from ___ to ___ atom takes place during ionic compound formation
Metallic to non metallic
Ionic Bond formation is due to
Electrostatic force of attraction
No. of electrons donated/accepted by the valence shell of an atom to attain S.E.C is called
Electro valency
covalent compounds are formed between ______ atoms/elements
Non metallic
No. of electrons pairs shared to achieve S.E.C
Covalency
Two types of covalent compounds
Polar and non- polar
Non polar covalent compounds means
Shared pair of electrons are equally distributed between two atoms
Charge separation does not take place in _____ covalent compound
Non polar
When shared pair of electrons are unequally distributed between two atoms,
Polar covalent
