HIT 1403 Lecture Notes - Ionic Radius, Covalent Radius, Chemical Bond
Document Summary
1 : p e r i o d i c t a b l e a n d t r e n d s. When the elements are arranged by atomic mass, certain sets of properties reoccur periodically. Mendeleev"s better because left blank spaces for undiscovered and corrected some atomic masses. No mention of nobel gases (until ramsay) Good conductors, malleable, ductile, high b/m points. Look like / behave like metals but have non- metallic properties. Max number of valence electrons, difgicult to alter this congiguration. High degree of chemical inertness. No deginite place on periodic table. Main group metals tend to lose electrons, with al being only non- main group. Main group non- metals tend to gain electrons, as well as n and p. Some transition metals don"t have to achieve full shell. Some can achieve half (iron) Probability of ginding electron decreases with increasing distance from nucleus, but never. 0, so no outer boundaries.
