Periodic Table With Atomic Mass 20172017 muted colors periodic table this basic printable periodic table lists the element name symbol and atomic number table pdf atomic number with and periodic mass 2017 search of elements resultsThis printable periodic table chart contains the element s atomic number symbol name and mass it is optimized to fit on a standard this is a basic periodic table containing the element s symbol atomic number and mass 2017 muted colors periodic table this basic printable periodic table lists the element name symbol and atomic number Wiki info
The lower the values of ionization energy, electronegativity and electron affinity, the more metallic character the element has. Conversely, nonmetallic character increases with higher values of these properties.  Given the periodic trends of these three properties, metallic character tends to decrease going across a period (or row) and, with some irregularities (mostly) due to poor screening of the nucleus by d and f electrons, and relativistic effects, tends to increase going down a group (or column or family). Thus, the most metallic elements (such as caesium and francium) are found at the bottom left of traditional periodic tables and the most nonmetallic elements (oxygen, fluorine, chlorine) at the top right. The combination of horizontal and vertical trends in metallic character explains the stair-shaped dividing line between metals and nonmetals found on some periodic tables, and the practice of sometimes categorizing several elements adjacent to that line, or elements adjacent to those elements, as metalloids.