Ion
An ion is an electrically charged atom or group of atoms formed by the loss or gain of electrons
Anions
Are negative ions formed when atoms gain electrons, meaning they have more electrons than protons
Cations
Are positive ions formed when atoms lose electrons, meaning they have more protons than electrons
Ionic Bond
It is the strong electrostatic force of attraction between the (oppositely charged) negative & postive ions in a ionic compound
Lattice structure
Refers to the arrangement of atoms a substance in 3D space where the atoms are arranged in an ordered and repeating fashion.
Ionic Compounds
A compound formed when a non-metal and metal react and form ionic bonds.
Covalent Compounds
A compound formed when pairs of electrons are shared between atoms of non-metal elements.
Molecules
Is two or more atoms covalently bonded together
Dot-and-cross
Diagrams that can be used to show the electronic configurations in simple molecules
Double Bond
A double bound is when two adjacent atoms share two pairs of electrons and two covalent bonds are formed.
Triple Bond
A triple bound is when two adjacent atoms share three pairs of electrons and three covalent bonds are formed.
Intermolecular Forces
Are the weak forces of attraction acting between molecules
Allotropes
Different atomic or molecular arrangements of the same element in the same physical state
Metallic bonding
The metallic bond is the strong force of attraction between the positive metal ions and the delocalised electrons
Ionic Bonds
Is the strong electrostatic force of attraction formed between the oppositely charged metal & non metal ions in an ionic compound.
Covalent Bond
Is a type of chemical bond caused by two non-metals sharing pairs of electrons to reach a full outer shell.
