Create an abstract class named Element that holds properties of elements, including their symbol, atomic number, and atomic weight. Include a constructor that requires values for all three properties and a get method for each value. (For example, the symbol for carbon is C, its atomic number is 6, and its atomic weight is 12.01. You can find these values by reading a periodic table in a chemistry reference or by searching the Internet.) Also include an abstract method named describeElement().
Create two extended classes named MetalElement and NonMetalElement. Each contains a describeElement() method that displays the details of the element and a brief explanation of the properties of the element type. For example, metals are good conductors of electricity, while nonmetals are poor conductors. Write an application named ElementArray that creates and displays an array that holds at least two elements of each type. Save the files as Element.java, MetalElement.java, NonMetalElement.java, and ElementArray.java.