Well because we can use those elements for are own personal use like combining them to make better things like iron is in lots of things. Without knowing alot about the elements we wouldnt know how to use them
It is very useful for humans to know a great deal about the property of certain elements. This is because knowing such information can allow us to better employ the elements to benefit our lives. This is why the role of scientists in our society is so vital. Scientists not only discover the properties of the elements, but they also come up with ways in which we can use them safely, sustainably and efficiently.
