# Question df169

May 14, 2015

Manganese is a transition metal, which means that it can use the electrons located in its d-subshell as valence electrons.

The number of valence electrons a transition metal can have depends on how many electrons it has located outside its noble gas core.

The noble gas shorthand configuration for manganese is

"Mn": ["Ar"] 4s^(2) 3d^(5)

This implies that manganese can have as many as 7 valence electrons, 2 from its 4s-subshell and 5 from its 3d-subshell.

For transition metals, the electrons located in the "n"color(red)("s") and "(n-1)"color(red)("d")# subshells are considered to be valence electrons, i.e. are avalable for bonding.