PS.4a
| periodic | period | group | element |
| alkali metals | alkaline-earth metals | halogens | noble gases |
| symbol | atomic number | atomic mass | family |
PS.4b
Metals
Metalloids
Nonmetals
PS.4c
| chemical bond | valence electrons |
| ionic bond | ions |
| covalent bonds | molecule |
| chemical formula | metallic bond |
| ionic compound | covalent compound |