Bonding (all of them) Flashcards
What is a covalent bond
Is a strong bond of electrons (a shared pair of electrons
What are the properties of covalent bonding
Occur in non-metals elements or compound
Share electrons to get a full outer shells
A covenant bond of electrostatic attraction between a shared pair of electrons and the nuclei of the bonded atoms
Each shared pair had a covenant bond
Covalent bond definition
The electrostatic attraction between a shared pair of electrons and the nuclei of the bonded atoms
What is an example of a Giant Covalent lattice
Diamond
Because it consists only of carbon atoms
Each carbon is attracted to four other in a tetrahedral arrangement
Graphite
Fullerenes
Graphene
Why is diamond hard
Because every covenant bond is very strong and the tetrahedral arrangement makes its structure rigid
What are the properties of diamond
High melting point
Don’t conduct electricity
Can graphite conduct electricity
Yes because it’s got delocalised electrons between the layers of carbon atoms which are able to move, in a similar way to a metal
what are the properties for metallic bonding
high melting and boiling point solid at room temperature( except Hg) malleable ductile conduct electricity and heat hard and strong sonorous lustrous magnetic (only three which are, Fe, Ni, Co) insoluble in any solvent
what is an alloy
An alloy is a combination of metals and of a metal or another element. Alloys are defined by a metallic bonding character. An alloy may be a solid solution of metal elements or a mixture of metallic phases.
how does the alloy change the structure/properties of a metallic
in a alloy, the layers are interrupted as the atoms are different sizes
the layers can no longer slide over each other
so alloys will be stronger, harder, less malleable and less ductile than the metals they contain
