EVERYDAY SCIENCE

Detailed explanation-1: -Chemical properties are very useful in identifying substances. However, unlike physical properties, chemical properties can only be observed as the substance is in the process of being changed into a different substance. Gallium metal melts at 30 oC. Iron metal rusts.

Detailed explanation-2: -A chemical property is any ability to produce a change in the composition of matter. Flammability and reactivity are two examples of chemical properties. Chemical properties can be observed only when the substances in a sample of matter are changing into different substances.

Detailed explanation-3: -Physical properties of matter include color, mass, density, melting point, and odor. These are properties that can be observed or measured without changing the matter to a new substance. Physical properties differ from chemical properties such as flammability or reactivity.

Detailed explanation-4: -Chemical Change. Chemical changes occur when bonds are broken and/or formed between molecules or atoms. This means that one substance with a certain set of properties (such as melting point, color, taste, etc) is turned into a different substance with different properties.

Detailed explanation-5: -Chemical properties are those characteristics that can only be observed when the substance is undergoing a change in composition. Another way of saying this is that chemical properties determine the changes that substances undergo when they participate in chemical reactions.