EVERYDAY SCIENCE

Detailed explanation-1: -Rusting is an example of a chemical change. A chemical property describes the ability of a substance to undergo a specific chemical change. A chemical property of iron is that it is capable of combining with oxygen to form iron oxide, the chemical name of rust.

Detailed explanation-2: -Chemical properties are properties that can be measured or observed only when matter undergoes a change to become an entirely different kind of matter. They include reactivity, flammability, and the ability to rust.

Detailed explanation-3: -Reactivity is the ability of matter to combine chemically with other substances. For example, iron is highly reactive with oxygen. When it combines with oxygen, it forms the reddish powder called rust (see Figure below).

Detailed explanation-4: -Tarnish is the product of a chemical reaction between a metal and a non-metal compound such as oxygen or sulfur dioxide. A thin layer of corrosion forms over the metal, which mars its shine. What metals can tarnish?

Detailed explanation-5: -Reactivity is the ability of matter to combine chemically with other substances. Some kinds of matter are extremely reactive; others are extremely unreactive. For example, potassium is very reactive, even with water. When a pea-sized piece of potassium is added to a small amount of water, it reacts explosively.