Documents Argon

Argon is a chemical element represented by the symbol Ar. Argon has atomic number 18 and is the third element in group 18 of the periodic table (noble gases). Argon is the…

Documents The Periodic Table. Alkali metals Highly reactive metals in group 1A of the periodic table Alkaline...

Slide 1 The Periodic Table Slide 2 Alkali metals  Highly reactive metals in group 1A of the periodic table Alkaline earth metals  Fairly reactive metals in group 2A…