Chem (3)

Annotations:

• Compounds and mixtures Chemical Bonding: -Ionic -Covalent

1. Compounds

   Annotations:

   • A compound is a pure substance made up of two or more types of atom chemically combined. e.g. methane CH4, Water H2O e.t.c. The chemical bond in a compound can either ionic or covalent   A chemical formula is used to describe the number and types of atom present in a compound. e.g. methane CH4 is a compound made up of 1 carbon atom bonded with 4 hydrogen atoms.
2. Mixtures

   Annotations:

   • A mixture is made up of two or more substances that are mixed, but not chemically joined, and that can be easily separated by a physical proccess
3. Ionic Bonding

   Attachments:

   • Chem Notes
4. Covalent Bonding

   Attachments:

   • Chem Notes
   1. Chemical Bonding

      Annotations:

      • Atoms can form bonds with each other by giving, taking or sharing electrons in order to achieve a full outer shell of electrons. This is a stable electron arrangement like that of the Noble Gases.