Chapter 24 Metals and Non Metals Almost 45

Chapter 24 – Metals and Non. Metals • Almost 4/5 of non-metals are the opposite to those of metals in general • Metals have a number of properties in common © Edco 2010 Exploring Science Chemistry

Chapter 24 – Metals and Non. Metals © Edco 2010 Exploring Science Chemistry

The properties of non-metals are the opposite to those of metals © Edco 2010 Exploring Science Chemistry

Alloys are mixtures of metals. Here are some examples © Edco 2010 Exploring Science Chemistry

Chapter 24 – Metals and Non. Metals • Corrosion — A process whereby a metal changes to its oxide or some other compound by combining with oxygen from the air. © Edco 2010 Exploring Science Chemistry

Chapter 24 – Metals and Non. Metals Rusting The corrosion of iron occurs when iron is exposed to both water and oxygen. Rusting occurs in test tubes A and D only. © Edco 2010 Exploring Science Chemistry

Activity Series • All metals have different reactivities. Some, like Sodium (Na) and potassium(K), are very reactive while others, like gold (Au), are unreactive. © Edco 2010 Exploring Science Chemistry

Let’s compare four metals: Calcium, Magnesium, Zinc and Copper Calcium is the most reactive, then Magnesium, followed by Zinc. Copper is the least reactive © Edco 2010 Exploring Science Chemistry

Chapter 24 – Metals and Non. Metals © Edco 2010 Exploring Science Chemistry