We looked at the electron structure of the first 18 elements in the periodic table. This will help us to understand ionic and covalent bonding later.

• The first shell can hold up to 2 electrons.
• The second shell can hold up to 8 electrons.
• The third shell can hold up to 8 electrons.

more information

web elements  - a site that is really worth a look

The units from which all others are derived are :

kilograms, seconds, candela, metres, amperes,kelvin and moles

you also need to know some derived units e.g. for volume, speed and strength

This sheet is to be completed by friday (9Bb7). I am having problems sharing documents at the moment so make sure you have your hard copy. Come and see me if you have lost it.

Today we looked at lung structure, how we breathe and some of the diseases caused by smoking.

the keywords are:

trachea, capillary, bronchii, bronchus, alveoli, alvelus, diaphragm, rib, rib muscle (intercostals), bronchitis, emphysema, pneumonia, heart disease, lung cancer