Calculate the `EAN` of `CO` in `[Co(NH_(3))_(6)]^(3+)`(Atomic number of `Co= 27)` .

The shape of [Co(NH_(3))_(6)]^(3+) is

The shape of [Co(NH_(3))_(6)]^(3+) is

In [Co(NH_(3))_(6)]Cl_(3) ,the number of covalent bonds is

Hybridisation in [Co(NH_(3))_(6)]^(3+) is

What is effective atomic number (EAN) ? Calculate EAN of cobalt (Z=27) in [CO(NH_(3))_(6)]^(+3) and of zinc (z=30) in [Zn(NH_(3))_(4)]SO_(4) .