Periodic table - Elements Wiki

Periodic Table of Elements periodic table of elements

The periodic table is arranged by atomic weight and valence electrons These variables allowed Mendeleev to place each element in a certain row

periodic table of elements The number of elements in a period increases as one moves down the periodic table because as the energy level of the atom increases, the number of energy sub- Revise atomic structure, atomic theory and the arrangement of elements in the periodic table as part of National 5 Chemistry  Between 1868 and 1870, in the process of writing his book, The Principles of Chemistry, Mendeleev created a table or chart that listed the known elements

พฤติกรรม ของ ผู้ บริโภค Periods are the rows of the periodic table, groups are the columns Every element has a unique combination of period and group, and a unique atomic number