Python script in an IDLE window 1. In the Code Editor, enter the program from Figure 1-7 that computes the area of a rectangle. 2. Press the Run button and correct any errors that occur. 3. Test the program with different inputs by running it at least three times. An example of the program input and output is shown below: Enter the width: 33 Enter the height: 22 The area is 726 square units.

answer: atomic mass was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version.

explanation:

originally atomic mass was used to arrange elements on the periodic table from left to right in a row. each column then shows similar properties of elements of a group.

in modern periodic table, the atoms are arranged in increasing atomic number. as atomic number represents the number of protons in an atom which is unique for every atom.