How many atoms of magnesium are in a 134 gram sample of magnesium?

No. of moles in 134g of Mg, n=134/24 =5.58 moles
No. of atoms = n* Avogadro number
                     = 5.58 X 6.022 X 10^23
                      =33.60 X 10^23 atoms

All the elements are arranged by melting points on the periodic table. in row they go from metals to gasses. in the row from sodium to argon, sodium is more reactive than the one on its right, magnesium.

7is b8 is d9 is c10 is a11 is d