Chemistry Online Practice Test 02

The atoms combine to form molecules, and molecules combine to form the large bodies. Have you ever wondered how we get self-aware of these atoms and molecules on which our universe is formed, and even though they are working around us, we are not able to look at them with the naked eye? The atoms and molecules have a big role in the formation of the universe. We cannot live without oxygen. It is necessary for human well-being. We cannot burn fire without nitrogen. Plants cannot photosynthesise without carbon dioxide. Ultraviolet rays from the sun are not able to reach the Earth because of ozone. We cannot make bulbs without tungsten. These molecules have a great role in our lives.

Chemistry is the subject through which we can describe these molecules perfectly and with accuracy. We have also produced many elements artificially. These elements have been grouped in the periodic table accordingly. If anyone of you is well aware of the periodic table and one is acknowledged for the grouping, atomic number, mass number, and symbols of the elements grouped in the periodic table, he or she should join this test because this test is totally based on the elements taken from the periodic table. Join this test and improve your chemistry knowledge. You can also adapt this test for the learning purpose or to recall the periodic table and the elements inside it. The test is very helpful for the chemistry students to enjoy and learn the new things and possibilities of the elements given inside the periodic table.