Flashcards in Chemical Bonding Deck (24):
Why does chemical bonding between atoms occur
Because the atoms taking part achieve a lower energy level (or greater stability)
The atoms taking part achieve a lower energy level (or greater stability) best describes the occurrence of
Chemical bonding between atoms
How does group A elements normally achieve stability through chemical bonding?
By acquiring a noble gas structure
By acquiring a noble gas structure will normally give stability to
Group A elements
For A type elements, the outer shell is called
The Valency shell
The Valency shell is
The outer shell for A type elements
What is the definition of; 'The valency of an atom'
It's defined as the number of electrons which must be lost or gained in order to achieve a completed Valency Shell.
What are the mechanisms that aid achievement for a Noble Gas outer Shell
Sharing Electrons, Gaining Electrons, Losing Electrons; these are all mechanisms for helping to achieve what?
A noble gas outer shell.
How are Covalent Bonds formed
When two atoms each contribute one electron to be shared. Each covalent bond thus consists of two electons
When two atoms each contribute one electron to be shared, this is the formation of what
Covalent Bonds. Each covalent bond thus consists of two electons.
Name some Atoms which can form multiple covalent bonds
Oxygen (2), Nitrogen (3), Carbon (4)
What are the Characteristics of the Covalent Bond (4)
It is specific: ie formed between two particular atoms
it is diectional: acts along a line joining the nuclei of the two atoms involved.
it leads to the formation of discrete molecules.
It is one of the strongest chemical bonds
What is Ionic Bonding
It's where one Atom donates one or more electrons to an acceptor so that both achieve the stable noble gas structure
Where one Atom donates one or more electrons to an acceptor so that both achieve the stable noble gas structure, is known as
Where does Ionic Bonding commonly occur
Between metal and non metal
Between metal and non metal is the common occurrence place for
The transfer of electrons in Ionic Bonding produces what?
Charged Atoms species known as Ions
Charged Atoms species known as Ions is the result of what?
The transfer of electrons in Ionic Bonding
What are the characteristics of Ionic Bonds
Non - Specific
Acts equally in all directions
Does not form molecules
What Atoms contain a very small number of weakly held valency electrons
How can the structure of Metal Atoms be visualised
As a cloud of electrons enveloping a number of positively charged ions, in which the mutual repulsion of the ions is balanced by the attraction of the ions to the electron cloud.
What are the characteristics of the Metallic Bond (5)
Non - Specific and Non - Directional
No Molecules Formed
Leads to the formation of simple crystal lattices
Electrical conductivity very high
Weakest of Primary Bond