Question

A given element Q has atomic number 14 and consists of isotopes as shown isotopic mass x-28 y-29 z-30 perecentage abundance x-92.2 y-4.7 z-3.1 a.)determine the relative mass of q b.)state group and period Q belongs

Answer 1

`= (28 * 92.2 + 29 * 4.7 + 30 * 3.1)/(100) \\ = (2810.9)/(100) \\ = 28.109amu \\ period = 3 \\ group = 4`