Metals react differently. Some are very reactive and others are unreactive. Observations of reactions can be used to put metals into an order of reactivity. For example, copper is unreactive so it can ...

There are 118 elements known at present. There are similarities as well as differences are the properties of these elements on the basis of their, all the element can be divided three types: Metal; ...

Note: This video is designed to help the teacher better understand the lesson and is NOT intended to be shown to students. It includes observations and conclusions that students are meant to make on ...