Bonding and Metals Flashcards
How does a Non metals bond to a metal?
Ionic Bonding
How does a metal bond to a metal?
Metallic bonding
How does a non metal bond to a non metal?
Covalent bonding
What is the arrangement of atoms in a metal called?
A regular arrangement (lattice)
When all the atoms are together in a metal, what do they give up?
They give up an electron?
What is this free roaming electron called?
A delocalised electron
Why do positive ions attract negative ions?
Because of electrostatic forces?
What force holds a metal in a regular structure?
Electrostatic forces, the positive atoms will be attracted to the negative delocalised electron
Give three properties of metals
Metals are malleable, good conductors of heat, good conductors of electricity, ductile, strong, solid, shiny
Why are metals malleable?
The regular structure of the metals allows the layers to slide over one another
Why are metals good conductors of heat and electricity?
Delocalised electrons can carry large charges and thermal energy
What is an alloy?
A mixture of two or more elements
Should alloys have different sizes of atoms?
Yes
What characteristic of alloys makes it stronger than pure metal?
The different sizes of atoms
What is ionic bonding?
Bond between metal and non metal
What are ions?
Charged atoms.
How are ions formed?
Formed when an atom gains or loses electrons.
Why do atoms always want to gain or lose electrons?
To have a full outer shell
What does a full outer shell give to atoms?
Stability
Will atoms with a full outer shell react with other elements and why?
They won’t because they already have a full outer shell so they don’t need to gain or lose electrons so they won’t react with anything.
What happens when an atom needs to gain an electron and an atom needs to lose an electron?
A transfer of electrons. Both atoms become ions.
What are the forces holding the ions together called?
Electrostatic forces
Are ionic bonds strong or weak?
They are strong
What is covalent bonding?
When non metals bond to non metals
How does covalent bonding work?
Atoms will share electrons?
Name the diagram used tpo represent covalent bonding?
Dot and cross diagram
