Science and Coding The periodic table is a listing of the chemical elements demonstrating the recurrence of chemical and physical properties. Many elements are named for their color, where they were discovered, and what they were used for. The elements were not discovered all at once. They were added gradually from 1790 until today. The last naturally occurring element to be discovered is francium in 1939. Since then, many new elements have been created in labs. French geologist Alexandre-Émile Béguyer de Chancourtois was the first to propose that the properties of the elements are related to repeating of numbers. He recognized that elemental properties recur every seven elements. He created an organization of elements based on this. Later, Russian chemist Dmitri Mendeleev created a table based on atomic weight. His table predicted the existence and properties of unknown elements. The elements gallium, scandium, and germanium were eventually discovered and fit his predictions quite well. The last major changes to the periodic table resulted from work by Glenn Seaborg. He discovered plutonium in 1940. Then, he detected all of the transuranic elements from number 94 to 102. In 1951, Seaborg was awarded the Nobel Prize in chemistry. Element 106 has been named seaborgium (Sg) in his honor. There are a few elements that have been named for scientists who contributed to increasing knowledge about atomic theory. These are listed in the table. Most of these elements are rare. Create a Scratch project that asks the user for the abbreviation for one of the elements listed in the table. Save the project as SciCode05 in your working folder. The program should check to see if the user input is valid. What code will you use to check for valid user input? If the user input is valid, the program should report the full name and atomic number of the element. How will you code the project to provide this output? Elements Public Domain Dmitri Mendeleev created a periodic table of elements that predicted the existence of unknown elements. Namesake Namesake Element Name Element Name Abbreviation Abbreviation Atomic Number Atomic Number Niels Bohr Bohrium Bh 107 Marie and Pierre Curie Curium Cm 96 Albert Einstein Einsteinium Es 99 Enrico Fermi Fermium Fm 100 Dimitri Mendeleev Mendelevium Md 101 Glenn Seaborg Seaborgium Sg 106 Goodheart-Willcox Publisher Several elements are named after scientists who made significant contributions to science. Copyright Goodheart-Willcox Co., Inc. 116 11 6 I t ti t C t S i C Introd oduction to Computer Science: Codingdi