Chemical bonding Flashcards
What is ionic bonding?
Electrons are transferred from metal to non-metal atoms to form positive and negative ions. These oppositely charged ions are attracted to each other
What is covalent bonding?
Electrons are shared between non- metal atoms
What is metallic bonding?
Electrons become delocalised and form a sea of free electrons, which attracts positive metal ions
What charge does a metal have?
A positive charge
What charge do non metals have?
A negative charge
What is the structure of ionic bonding?
Giant ionic - organised in layers, compact, strong bonds, lattice
What are the properties of ionic bonding?
Very high melting and boiling points-strong bonds
Don’t conduct electricity-ions cant move
Soluble-dissolves
What structure does covalent bonding have?
Giant covalent and simple covalent
Name the properties of giant covalent bonding
Cannot conduct electricity as there are no free ecletrons
Name the properties of simple covalent bonding
They have low boiling points + melting points= weak intermolecular forces
do not conduct electricity - no free electrons
Strong bonds
What properties does covalent bonding have?
Each molecule is bonded to 3 others
Weak forces of attraction
6 layers
What structure does metallic bonding have?
Delocalised electrons
Tightly packed neat rows
What is a delocalised electron?
Electrons that are free to move around the structure of the atom
What is a chemical bond?
An electrostatic force between 2 atoms
How is an ionic bond formed?
Opposingly charged ions are electro-statically attracted
