CHEMGEN Midterm: PERIODIC TABLE
11 Feb 2023
Department
Course
Professor
Document Summary
In 1829, he classified some elements into groups of three, which he called triads . The elements in a triad had similar chemical properties and orderly physical properties. In 1863, he suggested that elements be arranged in. Octaves because he noticed (after arranging the elements in order of increasing atomic mass) that certain properties repeated every 8th element. In 1869 he published a table of the elements organized by increasing atomic mass. In 1913, through his work with x-rays, he determined the actual nuclear charge (atomic number) of the elements*. he rearranged the elements in order of. Groups = vertical columns of the periodic table. The symbol for noble gas brackets that represents completed sublevels. The remaining electrons in order of their sublevels. Group trend as you go down a column, atomic radius increases. As you go down, e- are filled into orbitals that are farther away from the nucleus (attraction not as strong)
