what is the difference between metallic and non metallic elements? which elements make univalent ions?

 

 
 
 
 
 
 
examples of univalent ions are : k+, na+, f-,cl-,li+,rb+,cs+,br-,i-
 
 
 
 
 

| ***metallic elements*** | ***non-metallic elements*** |
| ·         metals are generally hard solid and vapourize only at high temperature.  | ·         non-metals are generally soft and usually gases or liquids. |
| ·         metals have a lusture called metallic lusture and can be polished.  | ·         non-metals lack luster. |
| ·         their melting and boiling points are high (except alkali metals and hg). | ·         non-metals usually have low melting and boiling points. |
| ·  n |