The importance and uses of oxygen gas in our life
Oxygen is a chemically active element, It is the first element of group 16 of the periodic table, It is important for the human and all living organisms as it is used in respiration...
Category: The Matter
The states of matter (solid, liquid, gas & plasma)
The states of matter All matters have a mass and take up space, the state of matter is one of the distinct forms that matter takes on, and there are four states of matter...
What are the kinds of molecules?
The molecules and the matter The molecules of one substance are alike in properties, but they differ from other substance molecules, the molecule is composed of tiny structural units called the atoms, A molecule...
Classification of metals according to their chemical activity and What is the chemical activity of metals?
Metals can be classified according to their chemical activity into three groups which are very active metals, less active metals, and inactive metals. The high reactivity of active metals makes them useful in a...