1. Chapter 6
Chemical bonding

2. Do now
Draw a web with pure substance as the main concepts
Pure substance

3. 3 different types of substances
Molecular substances (only non metal atoms)
Ionic compounds (metal and non metal ions)
Metallic compounds (only metal atoms)

4. Molecular substances
Composed of molecules in which elements share electrons.
Elements: molecules are made of 1 type of atom. Ex. H2 ; O2
Compounds: molecules are made of 2 or more types of atoms. Ex. H2O ; NH3 ; CO2

5. Molecular formula
Definition: shows the numbers and kinds of atoms present in a molecule of a compound. Ex. CO ( 1 molecule exist of 1 atom of carbon and 1 atom of oxygen) CH4 (1 molecule exist of 1 atom of carbon and 4 atoms of hydrogen)

6. Molecular compounds
Just one type of atom? H2 Hydrogen N2 Nitrogen O2 Oxygen C Carbon S8 Sulfur

7. Molecular compounds (binary compounds)
Prefixes are used to show how many atoms are present in each molecule.
mono, di, tri, tetra, penta, hexa, hepta, octa, nona, deca
(prefix + element root + ide)

8. Naming compounds (binary compounds)
CO2 * No mono prefix is used on the first element
Carbon dioxide Di means 2 oxygen atoms

9. Naming compounds (binary compounds)
N2O PCl3

10. Monatomic vs. Diatomic Molecules
Most molecules can be monatomic or diatomic
Diatomic Molecule is a molecule consisting of two atoms
There are 7 diatomic molecules (SUPER 7) – N2, O2, F2, Cl2, Br2, I2, H2
You can also remember them as: H2O2F2Br2I2N2Cl2

11. Bonding in molecules
Covalent compounds form by sharing electrons to attain a noble gas electron configuration. Regardless of the type of bond, the Octet Rule still must be obeyed (8 valence electrons)

12. Single Covalent Bond
A Single Covalent Bond consists of two atoms held together by sharing 1 pair of electrons (2 e-)

13. Double Covalent Bonds
Sometimes atoms attain noble gas configuration by sharing 2 or 3 pairs of electrons
A Double Covalent Bond is a bond that involves 2 shared pairs of electrons (4 e-)

14. Triple Covalent Bond
A Triple Covalent Bond is a bond that involves 3 shared pairs of electrons (6 e-)